- #1
mathal
- 77
- 0
(1/1-1/6) + (1/2-1/7) + (1/3-1/8)...+(1/95-1/100)
This was on the cover of a local paper with the caption "You can't solve this but he can!" The 'he' in the caption was a 12 year old boy. On the next page they gave as his solution 2.2. Two things are clear,
1.-the boy had the right answer and
2.-the editor cut the answer to one decimal point for brevity.
I was wondering, while I drove home from where I saw the cover and second page, what is the actual point one should stop adding the bracketed values to get closest to the abbreviated answer in the paper of 2.2. It took me about a minute to solve it in my head while driving.
No pen, paper and DEFINITELY no calculator required. Be as brief as possible in your explanation of the simplest solution.
mathal
This was on the cover of a local paper with the caption "You can't solve this but he can!" The 'he' in the caption was a 12 year old boy. On the next page they gave as his solution 2.2. Two things are clear,
1.-the boy had the right answer and
2.-the editor cut the answer to one decimal point for brevity.
I was wondering, while I drove home from where I saw the cover and second page, what is the actual point one should stop adding the bracketed values to get closest to the abbreviated answer in the paper of 2.2. It took me about a minute to solve it in my head while driving.
No pen, paper and DEFINITELY no calculator required. Be as brief as possible in your explanation of the simplest solution.
mathal
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