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  50. Brain Teaser #49
  51. Brain Teaser #50
  52. Logic puzzle
  53. Brain Teaser #51
  54. Brain Teaser #52
  55. Brian Teaser #53
  56. Brain Teaser #54
  57. Brain Teaser #45
  58. Einstein's Intelligence Quiz ?
  59. Brain Teaser #56
  60. Brain Teaser #57
  61. Brain Teaser #58
  62. Brain Teaser #59
  63. Brain Teaser #60
  64. Brain Teaser #61
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  67. Brain Teaser #64
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  81. Brain Teaser #78
  82. Brain Teaser #79
  83. Brain Teaser #80
  84. Brain Teaser #81
  85. Brain Teasers Open to All
  86. Brain Teaser #82
  87. Brain Teaser #83 (and I promise there is only one right answer)
  88. Brain Teaser #84
  89. reTurn the time
  90. reTurn Time - 2
  91. Brain Teaser #87
  92. reTurn Time - 3
  93. Brain Teaser #89
  94. Help needed on a brainteaser
  95. Brain Teaser #90
  96. Brain Teaser #91
  97. Brain Teaser #92
  98. Brain Teaser #93
  99. Brain Teaser #94
  100. simple code
  101. lying about truth
  102. riddle
  103. Brain Teaser #98
  104. Hats Off to the Ministers
  105. new riddle
  106. Quickie
  107. Brian Teaser++++++++
  108. a wolf, a goat and cabbage
  109. riddle
  110. Triangle Puzzle
  111. d[x[sup]2[/sup]]/dx = x
  112. Impish Sprite
  113. Rope clocks
  114. Late for school?
  115. Math related riddle!!!
  116. Digging to China
  117. beer story
  118. Shock absorber
  119. what came first?
  120. Canned Hams - quickie
  121. Paint mixing
  122. 5 Star Logic Problem (100 prisoners and a light bulb)
  123. Kind of Riddle
  124. Help
  125. tiles
  126. Color of Bear Puzzle
  127. Searching for a non-negative integer...
  128. Black's last move?
  129. Hats
  130. $60,000.00 question
  131. Crossing the desert (in a steam powered car)
  132. Drawing a path
  133. Scouts
  134. Flowers (hope this one lasts a bit longer)
  135. R = PI Ohms
  136. Row, Row, Row your boat...
  137. Petals Around The Roses
  138. I live just over a star, and yet I do not burn
  139. What can you share yet still have all for yourself
  140. Quickie
  141. Strange words...
  142. How old are they?
  143. total distance
  144. check or bet
  145. more strange words
  146. riddle poem
  147. Who owns the fish?
  148. Medication problem
  149. next door neighbours
  150. the door story
  151. fake coin
  152. fake coin #2
  153. Box Clever
  154. More Dice
  155. Philosophical Beliefs
  156. Read the mixed up words
  157. A rolling problem
  158. What does a soda cost?
  159. Logic Problem – test your logic
  160. center of mass
  161. A Geometry challenge
  162. Last geometry challenge (very difficult)
  163. Going off on a tangent.....
  164. brownies
  165. Slice the Donut
  166. Two Cubes in 3d
  167. Two old men....
  168. 1+1= ?
  169. Teasing your brain
  170. Riddles!
  171. From D to M, how far and what way
  172. Math Problem
  173. Infinite Ladder Network
  174. Coloured Hats
  175. Three-Dimensional Resistance
  176. Bridge Circuit
  177. truth teller vs liar : go to Hell !
  178. I lost my calculator batteries in a flood.....
  179. blind man
  180. cultural groups
  181. handshakes
  182. Forty 1lb Weights
  183. beans
  184. Simple number game
  185. Balls in boxes ( probability )
  186. Nine Digit Numbers
  187. Doobie weigher
  188. expert puzzle
  189. Ten Digit Numbers
  190. 12 red snooker balls
  191. Crack the code!
  192. the product
  193. Hydrogen Room
  194. Sister probability
  195. 5th grade brain teaser
  196. [SOLVED] Two fat guys
  197. Fox sheep cabbage - mind emotions body
  198. Feilds on the edge of town
  199. pyramids
  200. tricky lockers...
  201. How old are my daughters?
  202. Parenthize
  203. Google Labs Aptitude Test
  204. a wicked master
  205. High-voltage!
  206. Light Switches
  207. Fox, Sheep, Cabbage problem - revisited
  208. Another Site's Questions
  209. Five Rooms puzzle
  210. Temperature of Iron.
  211. Two beers
  212. Professor's Lab
  213. Signboard injury
  214. Professor
  215. Unsolved Equation
  216. Creative (lateral) thinking to solve a complex problem
  217. No Peeking!
  218. What is this ?
  219. large number...
  220. Matching game
  221. box thing
  222. What is the time?
  223. find P
  224. wanna brain teasers?
  225. Brain Teasers Help
  226. where is the 2 bucks?
  227. Five and One
  228. Good riddle, How do you get off the island?
  229. The PF Treasure Hunt
  230. Age of the ship?
  231. Treasure Hunt Solutions
  232. camel and fig
  233. who's the spy?
  234. biggest number
  235. class
  236. shortest path
  237. easy problem
  238. Motion of Particle in a Magnetic Field
  239. Neverneverland and the three old men
  240. Fun little riddle
  241. How Old Are the Three Sons?
  242. Easy teaser. Well, its not really teasing then is it???
  243. Hunting ducks. Not too hard.
  244. -1 = 1
  245. Cut up the star
  246. Funny Riddle
  247. can your brain handle this 2?
  248. Logical Question
  249. Math Problem
  250. A problem of lint
  251. The illiterate art critic
  252. Number Theory
  253. "Cuckoss's Egg" sequence, next number?
  254. Geometry problem
  255. 64 Squares
  256. permutation groups
  257. Mile hill
  258. Infinite array of resistors
  259. Brain teaser.
  260. Bridge over troubled waters
  261. Yes, all the information needed is there
  262. if 3 cats eat 3 mice in 3 minutes; how many cats for 100 mice in 100 minutes?
  263. the difference between a chicken
  264. This Statement Is False
  265. Trebuchet anyone?
  266. Flying weight change
  267. time dilation
  268. how bright?
  269. Digital Pedometer for energy expended in exercise
  270. Pocket Calculator
  271. This is Not Pron
  272. A 3-D collision
  273. Need help with this puzzle...
  274. German Logic
  275. Missing digit
  276. Floating
  277. pills
  278. Fairly easy brain teaser
  279. Scientists don't have the answer...
  280. As I was going to St. Ives
  281. My corny brain teaser 2
  282. Something a little different
  283. tunnel through the centre
  284. Why do race cars use wide tires?
  285. 2=1
  286. Smargest number
  287. Code
  288. Take me to your leader
  289. How high can you count on fingers and toes?
  290. 101 from 3, 4, 8 and 9
  291. Physics Teasers : Part 1
  292. Equator and Polar Clocks
  293. It's good for you
  294. Ten Sheep
  295. Win A Dollar!!!
  296. how old are my 3 children?
  297. lockers
  298. Piss Bottle
  299. 7-11
  300. Help!!!
  301. I want to ride my bicycle
  302. Magic square
  303. Simple Math...
  304. How does it turn?
  305. Inertia
  306. The Dark Room
  307. Hair of the Dog
  308. A cow dance
  309. riddle
  310. Practice your LATEX skills!!!!!
  311. Can you solve this riddle?
  312. happy numbers
  313. Prove this!
  314. sum of series???
  315. let ur mind work
  316. hot coffee!!
  317. can you explain this?
  318. what is it?
  319. Come play IF you Dare!!!
  320. reducing 1 million to 7
  321. Come play If u Dare !!!
  322. Magic camera
  323. Einstein's riddle
  324. What is the mystery item?
  325. Which travels fastest?
  326. logical thought
  327. Math/drinking teaser
  328. Trig.quiz
  329. almost infinity
  330. Arithmetical teaser
  331. Hmuan Mnid-Paomnnehel Pweor
  332. El Cheapo Number Game
  333. make 21
  334. what comes next?
  335. Huygens & non-orbital re-entry speed
  336. n-dimensional trianglehedron?
  337. Infinite possibilities
  338. Lightbulbs!
  339. Slipping stick
  340. Triangle with extra area???
  341. Family Members
  342. Spheres
  343. Stepping paths
  344. How is it possible ?
  345. Stepping paths II
  346. Cat and mouse
  347. More cat and mouse
  348. Number Sequence
  349. The Hardest Logic/puzzle Question Of All Time!
  350. Money Machines
  351. weird pattern on car
  352. Extremely cool IQ test
  353. coin weighing problem (ibm)
  354. Puzzler
  355. prove!!!
  356. Sexy underwear worn by PF Sisterhood.
  357. Speed Dating the PF Sisterhood
  358. Counting paths
  359. Where the hell is Gokul?
  360. Handshakes
  361. The Solution To The Hardest Logic Puzzle Ever!
  362. When rotten PF members were rotten PF kids
  363. What next?
  364. Petals Around the Rose.
  365. the dark room
  366. Chess puzzle
  367. speeding car
  368. Without using a calculator
  369. Not an exact brain teaser, but..
  370. Happy Math
  371. Sequence
  372. find x
  373. Man Vs Bus
  374. Twins
  375. hanging over the edge
  376. PLz help me in this Corner Reflector Problem
  377. Eot-Cat-Cit
  378. Plz help me in this light problem
  379. a truel (part 1)
  380. Who am I?
  381. Anyone know good math games?
  382. in term of
  383. find ef
  384. tower of hanoi
  385. Triangle paradox
  386. What animal and elephants?
  387. Frogleap
  388. Mental arithmetic
  389. Mr. Fubini
  390. shoes
  391. Puzzle game
  392. Liquid
  393. round table
  394. rainy day
  395. tria
  396. Hong Shui
  397. Need some Free Flash Math Puzzles
  398. Trains
  399. Arithmethic
  400. find x
  401. Pearls before swine
  402. Difficult "IQ" test
  403. The Bear
  404. World's easiest quiz
  405. Land
  406. Relativity Rabbit
  407. A Riddle
  408. Stairs.
  409. King and his knight
  410. Pirates
  411. Camera Mystery
  412. Flight distance
  413. Getting out
  414. Try to find out what this is :
  415. Pattern
  416. Worlds
  417. Spiders
  418. Sequence
  419. Binary Sequence
  420. The dog jumped over the fence? Polysemys
  421. You are cordially invited to match wits with some of the best minds in IBM Research.
  422. Cursive letters
  423. Hardest puzzle on the internet
  424. pattern
  425. Brainteasers....
  426. Picutre Puzzles.
  427. 3 light bulbs 3 switches
  428. Night of the living straight edge!
  429. Nuber problem
  430. More this is not pron
  431. If you ever said any of these, think twice
  432. Paparidox
  433. Quick and witty!
  434. Fly in a car
  435. What will be the resistance
  436. time
  437. integration x^-1
  438. Knowledge Horizon Contest
  439. infinity
  440. HELP...I Can't Figure Out These Number Patterns
  441. Sum of diagonals
  442. [SOLVED] The Bear and the Food
  443. Dichotomy
  444. Math limerick
  445. Math limerick
  446. old brain teaser....
  447. An age-old problem
  448. egg dancing (or something)
  449. Stupid Seller???
  450. Numeric Nonsense
  451. hand shaking (again)
  452. An important part of the boat
  453. teaching
  454. who am I?
  455. The method
  456. Helpppppppppppppppp!
  457. Complete the Array Series
  458. Pattern
  459. Math professor and number of rooms
  460. Painting the plane
  461. sqrt
  462. Unusually common dice
  463. fake coins
  464. hardest logic problem ever
  465. A somewhat easier liar/truther puzzle
  466. the easiest logic puzzle of all time
  467. hard logic problem
  468. Quick Little Word Teaser
  469. Fisher's riddle.
  470. Cannibal Logic
  471. This one may be easier than cannibal logic
  472. Adequately showered?
  473. who am i?
  474. alone in the dark
  475. Numbers - Confused Yet?
  476. Missing Dollar
  477. Picture puzzle
  478. Last Wish
  479. Multiplying by 2
  480. boggle your mind
  481. A small problem
  482. Another pattern
  483. Easy logical number puzzle
  484. Chess problem: White to mate in 2
  485. Square Pyramid puzzle
  486. Next Number
  487. Yet Another Pattern?
  488. Murder Mystery
  489. Squared Pattern
  490. Puzzles at the MathCad website
  491. Help Please!!
  492. Riddle
  493. Another riddle
  494. Help really really really needed!
  495. The GREAT thread of riddleness!!!
  496. triangle
  497. Would you jump off too?
  498. Ticket writing protocol.
  499. Universal Sequence
  500. Somewhat Simple Pattern
  501. Why No Explosion?
  502. Need good riddles!
  503. 142[999]857
  504. Nine Dots
  505. Navigation Problem
  506. Trick question
  507. Sequence
  508. big commute
  509. Cheaper by the dozen
  510. inspector Colombo
  511. Tiling problem
  512. Bisect a plane figure.
  513. Sharing Tuskers
  514. A Logic Puzzle
  515. A Bridge Puzzle
  516. Missing person illusion
  517. another number pattern
  518. yet another number pattern
  519. Petals around the Rose
  520. factors
  521. Need solution to this puzzle
  522. trademark
  523. Poison bottles
  524. Procedure
  525. Minesweeper puzzle
  526. Einstein, the farmer and the cows
  527. 6-inch bar
  528. Three bulbs.
  529. Four fours
  530. Mysterious
  531. Sliding Blocks
  532. The Lift Problem
  533. Minesweeper puzzle
  534. substrings and superstrings
  535. faulty balls
  536. faulty coins
  537. Simple puzzle
  538. Sequence
  539. Car game
  540. sense
  541. The hardest logical puzzle according to George Boolos
  542. Statistical Geometry
  543. Number Patterns!
  544. Geometry Puzzle
  545. Microsoft interview questions
  546. Grade 2 Puzzle
  547. Get them across the river...
  548. the power of 7
  549. Elliptical Constant
  550. Fibonacci sequence
  551. 1, 2, 3, 4, 5, 6, 7, 8
  552. A sequence of sorts...
  553. Four Nines Puzzle
  554. Movie Tickets
  555. 12 objects and only three experiments
  556. Two person with the same number of friends?
  557. Does anyone know this question ??
  558. Save 10 prisoners
  559. basic problem
  560. square roots
  561. Corey the camel
  562. Pity Man need help....
  563. hay... magic.
  564. Square root of 3?
  565. TRAIN Driver.
  566. puzzle idea
  567. Mirror
  568. how'd he know there was sh.it on his head?
  569. Another river problem..
  570. Bear
  571. 12:34
  572. In a certain country
  573. Cannibals
  574. Logic Lovers
  575. The ole 12 snooker ball question (and my job!)
  576. space ship collision
  577. Metric System Story
  578. MI String
  579. Barber's paradox
  580. camera angles
  581. 5-suit Texas Hold 'Em: ace high beats one pair
  582. beads puzzle
  583. help
  584. Another Sequence...
  585. advantage of both.
  586. Algorithm ponderer
  587. Mr Explorers treasure hunt
  588. Help these poor little frogs!
  589. Race between Bon Jovi and Kurt Kobain
  590. switches-lightbulbs
  591. primes
  592. Two daughters in rivalry
  593. Interesting puzzle involving prediction/preemption
  594. Can't figure this one out
  595. Never seen on the web
  596. Next Number?
  597. where's the fish?
  598. Su Doku
  599. count the letters
  600. familiar numbers puzzle
  601. Confounding handshaking puzzle
  602. Need some help with a murder mystery
  603. Four 4s
  604. Does God have tile floors?
  605. Pythagorean triangles
  606. Orbital Puzzler
  607. axes
  608. Where's the change?
  609. I was feeling a bit clever
  610. I am the only one here
  611. my 1st puzzle post
  612. my 2nd puzzle post -sequence
  613. Three 3's
  614. Einstein's Riddle
  615. pattern possible?
  616. deductive logic problem
  617. Anyone good at cryptology?
  618. Ths wrd hs n vwls
  619. Color for hidden text
  620. really challenging puzzle
  621. Poker Chip Puzzle...
  622. Cryptogram...
  623. Simple Formal Logic Riddle
  624. A little Contest... Show me something that is Absolutlly Useless
  625. encryption
  626. 12 coins
  627. Mod-x
  628. The sky is falling down on me
  629. The Blind Mathematician
  630. Brain Teaser with Answer Unknown
  631. Probability Oddiments
  632. Chess Bain Teaser
  633. 12 coins, and one counterfeit.
  634. dividing space with 5 planes
  635. N 4's - Redux
  636. The ants go marching....
  637. Can you break it !! i bet u cant !
  638. Flash Mind Reader
  639. zio (india) problem i don't know how to solve such problems
  640. Word Challenge
  641. tattoo teaser
  642. divergence of the harmonic series
  643. Next Number in the Sequence.
  644. "Hardest internet enigma"
  645. Two more sequences
  646. Weighing the balls
  647. 3rd puzzle post
  648. 4th puzzle post
  649. decrypt this
  650. 5th puzzle post-the impossible sequence
  651. Yet another sequence
  652. I'd had grammar lessons by then
  653. Grammar Lesson #2
  654. Something easy.
  655. Simple, but fun
  656. A Puzzler
  657. Dr. Watson and German secret Club
  658. Permutation derivation?
  659. What is the 5 numbers?
  660. The solid angle of coffee
  661. What #?
  662. 4 doors to hell riddle
  663. Machine VS Human
  664. "Lost" (TV Show) Equations
  665. Brain Teasers and Math Problems
  666. Divisibility
  667. Liars and Truth Tellers
  668. New Da-Vinci-Code-movie puzzle, by Google
  669. A real big toughie. Takes some time.
  670. fun finding i just found
  671. Connect the dots
  672. Shollenbarger's Clock
  673. Some brain teasers~~~~Plz look and try....
  674. Needed: More brain teasers
  675. a word riddle
  676. Prisoner's Dilemma
  677. websites
  678. Decoding/Decrypting sheet music
  679. Brains=$$$
  680. Please don't email me anymore. I just can't take it
  681. I've made a few mistakes in my day
  682. Need Fast Help
  683. Prove this!(fun proof)
  684. I'm new and need HELP
  685. A ringing headache
  686. Still needing HELP..but should have posted this
  687. probability
  688. absent minded clerk
  689. Prisoner's Choices
  690. BRAIN TEASER PROBLEM! Please help me!
  691. Deductive Reasoning Q?
  692. Go figure - check this out
  693. Another Boat Question. Need help though!
  694. Really hard Brain teaser I need help with.
  695. Ubi-Ubi's Ruby
  696. anybody preparing for multiple question choice exam try this!
  697. Math Teaser!!
  698. A Division Puzzle
  699. An Examination Puzzle
  700. Some new cookies started appearing in The Bakery very recently.
  701. IQ Test Questions
  702. Really Tough/Fun Brain Teaser
  703. einstein quiz
  704. Physics Quiz of the Year
  705. No Peeking
  706. Slightly harder
  707. Circle's brain teaser challenge
  708. Superdokey
  709. Circle's slightly harder challenge
  710. Albert Einstein's Riddle...
  711. Really good brain teaser site
  712. Gun Problem
  713. cum'on try thiZzzzzz.....!! :)
  714. A question....!
  715. Apputten mangoes in a box and you savithree ok?
  716. Who's that?
  717. Find it why!
  718. True or false?
  719. Old Man & Wrinkle
  720. 1st Day at school
  721. Pyramid of Egypt
  722. Grandpa's age
  723. Pizza deal
  724. Fill it up!
  725. The pole in a lake!!
  726. Who got a brainteasers book for Christmas... ?
  727. Painting job
  728. Brain Teasers Q&A Game
  729. doctors...
  730. Top Spin!
  731. Tricky Questions!!!
  732. Room on Stilts
  733. Sequence
  734. Break the code
  735. Fill the word ,game.....
  736. A couple of puzzles
  737. flipping the M
  738. Two Vowel Puzzles
  739. A Space And Time Puzzle
  740. Lateral Problems
  741. Riddle Time!
  742. Terminate This If You Can!
  743. Lateral thinking puzzles.
  744. Hidden Text, People!
  745. An Orange Consumption Problem
  746. Poison Bottles
  747. Bad Coin
  748. A monk problem
  749. A Chessboard Puzzle
  750. A Dinner Puzzle
  751. this is a hard code to crack
  752. pretty hard (yet simple) puzzle
  753. Brackets
  754. Trigonometry "puzzle"
  755. A semi-tough question I came accross
  756. Where is the father?
  757. Ken ju andrstend dis?
  758. A Color problem.
  759. A tribute to demystifyer
  760. Piece of cake
  761. next number in a sequence
  762. weighing marbles
  763. what color hat do you have on ?
  764. Age of kids
  765. Professor's game
  766. An Integer Temperature Puzzle
  767. A Handshake Problem
  768. What Colour is your Hat?
  769. hidden code
  770. Mirror on the Wall...
  771. i invented a card game based on the 'wheel'
  772. Interesting Maths Puzzle
  773. In which scenario is this possible?
  774. Averagely difficult brain teaser
  775. Cryptanalysis
  776. Good riddles
  777. What row comes next?
  778. Location, location, location.
  779. 15 minutes per minute
  780. 3 rooms 3 bulbs
  781. Complicated Brain Buster!
  782. Weighing bags
  783. Getting max points on a grid
  784. how'd they figure that? (logic puzzle)
  785. strange combinatorics
  786. Weighing Puzzle
  787. Funny Brain Teaser
  788. Can a cube be cut in 27 smaller cubes in less than 6 cuts?
  789. Batman, Robin and Catwoman
  790. A Circle And Adjacent Number Puzzle
  791. Dominoes on a Checkerboard
  792. .:Deserted island:.
  793. How many children
  794. Tricky Track
  795. Topology riddle
  796. Troll Bridge
  797. Secuence and series
  798. Two Riddles
  799. Thermonuclear device to destroy hurricanes
  800. 8 balls, 2 weighings
  801. Weight of a plane
  802. 2x2, 5x5, and Gordians Knot
  803. Quantum Cat
  804. Paradox?
  805. Heaven or Hell?
  806. Microsoft Interview Brain Ache
  807. Brain Teaser - Scratch!
  808. More crazy, but logical, people ...
  809. iq 130+ simple but confusing brain teaser.
  810. cube partition
  811. Riddle
  812. Visual Brain Teasers Thread
  813. Can you solve this?
  814. good math riddles
  815. Interesting...
  816. multiply
  817. letter equations! ie- 7 D of the W = days week
  818. Mirrors...
  819. Burn ropes
  820. Don't burn these ropes
  821. Can you solve
  822. a Martin Gardner problem
  823. Simplest way to pay debts
  824. Card Game: 24
  825. Find The Missing Number
  826. Figure this!
  827. Help me solve this!!!
  828. [SOLVED] analogue and digital question (really urgent!)
  829. The light bulb.
  830. Dogsmead?
  831. Ship
  832. The Most Creative Response...
  833. Help please - DOG THE
  834. Can you help me solve these sequences
  835. what do these have in common
  836. 12 balls
  837. Riddle Competition Help
  838. got another one
  839. Riddle. This is really hard. Have fun!
  840. Add the numbers from 1 to 100
  841. thinking outside the clox
  842. am i right
  843. thinking out of the cat's box
  844. Math/ Economic brain teaser - due to the credit crisis
  845. Why is clockwise clockwise?
  846. Untangle
  847. A more extended and much much more challenging version of Einstein's puzzle
  848. An extended and much much more challenging version of Einstein's puzzle
  849. Diagonal Garden Path
  850. Riddle Quiz
  851. [Help!] Strange vague puzzle
  852. Geometry puzzle: plane X cylinder = ellipse
  853. Interesting hidden message
  854. Can you solve this sequence?
  855. Interesting and challenging IQ questions
  856. Coin weightings with two irregular coins
  857. [SOLVED] Funny Money Problem
  858. Science Challenge: Prove these magnets won't move
  859. An ant on a cube
  860. Math Brain Teaser
  861. Grumpy and Friends
  862. National Bureau of Standards, 3 GEE Cal test
  863. puzzle on shapes
  864. Boy Girl Paradox
  865. Another ant riddle
  866. names. ideas yea?
  867. 3rd grade ?
  868. In theory, this should be easy....
  869. What is the next number in the sequence?
  870. Fun Brainteaser
  871. (Not a text brainteaser) Speed Solving the Rubik's Cube
  872. The Face Game
  873. Simple Proof
  874. Ducks and Chickens
  875. Probability Question
  876. *Test Your Logical Skills*
  877. Next number: 61, 115, 771, 4129, 15649, ?...
  878. An Average Speed Paradox
  879. The Chinese Remainder Theorem (the CRT)
  880. IQ like pattern question
  881. Lockers
  882. :( Help!
  883. Grandpa and Grandma age?
  884. Can You See The Patterns..?
  885. Another political discussion
  886. Tossing a coin... 3 times ?
  887. Ten Digits And Operator Puzzle
  888. light bulbs
  889. Ascending Decimal Digit Puzzle
  890. circles and spheres
  891. A three digit number and reversal puzzle
  892. Balls puzzle.
  893. where can i find forum that solve these kind of questions..
  894. logical question..
  895. logical question..
  896. a puzzle
  897. a logical question..
  898. a logical question..
  899. a logical question..
  900. a question about strategy thinking this logical questions
  901. A flight around the world
  902. 12 coins and a balance beam scale
  903. a logical question..
  904. a logical question..
  905. a logical question..
  906. a biblical riddle..
  907. a logical question..
  908. 10 dwarves and a giant.
  909. a logical question..
  910. Long division with zero to nine substitution
  911. Zeta regularization riddle
  912. A question of latitude.
  913. i use another nick some_one=transgalactic
  914. a logical question..
  915. Brain Teaser!
  916. a logical question i tried to solve using VEN
  917. Four Clocks Problem
  918. Manage rectangular cloth for square table
  919. Way to Heaven
  920. Find population
  921. Country List
  922. Identify the balls
  923. Ship and rope problem
  924. how to make a glass out of a bottle
  925. Paint Can Problem
  926. Just for today.
  927. a logical question..
  928. Which coin is fake?
  929. ?? 45 minutes exactly ??
  930. Bertrand's Box Paradox and Monty Hall Problem
  931. a logical question..
  932. Opinions on Thinking Physics
  933. Getting progressive with arithmetic, geometric and harmonic
  934. Perimeter and radius
  935. King's Dungeon
  936. Cryptarithm And Integral Problem
  937. Acceleration
  938. Square BAE, Get ABCADE
  939. Divide by one thousand and equate the ratios
  940. Numbers in Triangle Rows of 3 are equal rows of 4 are equal
  941. Pirates Dividing Loot Question- NEW
  942. (4-digit number)*(6-digit number) equals a factorial
  943. Sum the squares cryptarithmetically, get square
  944. Crack this code if you can* Challenging
  945. What cometh next in the sequence?
  946. I can name that physicist in 5 notes.
  947. The Lamplighter's Manor
  948. Online professional IQ test?
  949. take fives And Sixes, Get N
  950. Playing Checkers 4 your life?
  951. Some Summed Digits In A 9-Digit Positive Integer
  952. Decimal and nondecimal almost perfect squares of the form aaabbb
  953. Summed exponents for a 8- digit positive decimal integer
  954. Four IQ test problems
  955. The first positive integer that cannot be specified in less than a billion words
  956. Next number in sequence-game
  957. One more number sequence
  958. subtract from 50
  959. Opening and closing doors
  960. New IQ test
  961. Edges in 11D Hypercube
  962. Riddle of the links
  963. Cut a cake
  964. No-one knows the answer to the tenth question ('cept me)
  965. Answer this if you know your physics?
  966. Can you sum the parts within ten seconds?
  967. Another Sequence
  968. Brain teaser Christmas gift
  969. Three brothers - two vehicles
  970. 9-level Tower of Hanoi variant
  971. Walking home from station
  972. Multiplying six by two gets twelve
  973. Getting the multiplier, multiplicand and the product with U’s
  974. (abcd)*(efghi) = acgefhibd
  975. Octahedron problem
  976. Semiconductor or conductor
  977. Multiplying two by two gets a square
  978. Telling the Will
  979. One-ninths of seven gets 7/9.
  980. Getting perfect squares with four cryptarithmetic numerals
  981. Divide each one digit number by product, and add to get 1
  982. Divide by one digit numbers by two digit numbers, and add to get 1
  983. brain teaser
  984. Riddle-d'Do
  985. Wrap around Tic-Tac-Toe
  986. How many triangles?
  987. Nice brain teaser
  988. How does that work then
  989. The 9 dot puzzle.
  990. riddle
  991. An annoying voltage question
  992. Ten prime numbers describing an arithmetic sequence
  993. 2 missing number riddles
  994. Shortest time in which P catches Q
  995. Prove ∑ … = (2^n-1)n!
  996. Riddle me this:
  997. Dwelling upon the triangular numbers
  998. Decimal integers with nonzero digits and sum of powers puzzle
  999. A dopey resistance question.
  1000. Looking for story riddles/brainteasers
  1001. Getting the maximum and the minimum with now
  1002. A Prince and Five Puzzle
  1003. Simple math question.
  1004. thine/ evenly = 2/15
  1005. this/ close = 5/12
  1006. judge and criminal
  1007. Seven digit base eight positive integer puzzle
  1008. You're in a room with 2 iron bars
  1009. Monday Morning Test
  1010. Prisoner Hats
  1011. Very Strange House
  1012. tell and deal puzzle
  1013. Pre and Ever Puzzle
  1014. What has yellow skin and writes?
  1015. Unbreakable encyrption
  1016. Sum the three primes, get number
  1017. Complex Engineering Puzzle!!!
  1018. Difficult Webhunt
  1019. Colored hats, liars, and truth-tellers
  1020. Hard Puzzle Indeed
  1021. Another Number Sequence
  1022. Board Game Sequence
  1023. Impossible Quiz
  1024. Logic problem
  1025. nid help
  1026. My first murder mystery
  1027. What's Next?
  1028. Cycles in a number-theoretic graph...
  1029. Why is this proof wrong
  1030. What is for sale?
  1031. Find the Error: Differentiation!
  1032. Decypher me
  1033. Number Sequence
  1034. Tricky math problem
  1035. Count the F's
  1036. River crossing brain teasers
  1037. 8-digit number and divisibility puzzle
  1038. Non duplicate digits and arrangement puzzle
  1039. abababcb and perfect square puzzle
  1040. How Many Girls for Every Boy?
  1041. Possible or Impossible?
  1042. Einstein's Riddle
  1043. long division
  1044. Flight tracking
  1045. Hardest Math Problem Ever?
  1046. Question on the ending of "A Clockwork Orange"
  1047. Cosmetic words to numbers
  1048. Brainteaser: General's colours
  1049. proposal four landmark games
  1050. Train station, speed and time puzzle
  1051. Hundred Sum and Prime Puzzle
  1052. Twin pair o' docks
  1053. Break this.
  1054. Twelve Sum and Digit Substitution Puzzle
  1055. Radial velocity extremes
  1056. Rare and Meer Puzzle
  1057. Squares, subsquares and arrangement puzzle
  1058. 3x3 square and common sum puzzle
  1059. Repaid and Ratio Puzzle
  1060. Row total and column total puzzle
  1061. area
  1062. try this one
  1063. Power and value assignment puzzle
  1064. Prisoner standing next to 2 doors and 2 guards
  1065. Recreational Math
  1066. Powers, substitution and equality puzzle
  1067. Game of bridge
  1068. This one is driving me nuts
  1069. Bricks
  1070. A competition
  1071. Hexagon Book puzzle that doesnt work
  1072. The old man and the bridge
  1073. building teaser..
  1074. lightbulb teaser..
  1075. multiple answer teaser..
  1076. A Tough Logical Puzzle- Requires Utilization of Mathematical Algorithms
  1077. A story game
  1078. 4-way stop
  1079. Exhausted by handshakes
  1080. The Perfect Euchre Deal
  1081. measure time burning two strings
  1082. Difficult logic series. Please help!
  1083. Brainteaser
  1084. Automata, language problem
  1085. IQ Test Questions
  1086. One wierd question
  1087. This is a really hard brain teaser, guys.
  1088. Riddle of Logic: Death by Firing Squad
  1089. One of These Things is Not Like the Others
  1090. Logic Puzzles
  1091. The Good, The Bad, and The Ugly
  1092. Physicists in survival situation