Are There More Interesting Numbers Like This?

In summary, the conversation discusses interesting number patterns where the sixes can be crossed out to form equivalent fractions. The numbers discussed include 26/65 = 2/5 and 16/64 = 1/4. The program provided also explores other potential cases and finds that there are no 3 digit examples where two of the digits can be crossed out.
  • #1
T@P
274
0
26/65 = 2/5 (cross out the sixes)

16/64 = 1/4 (again cross out the sixes)

are there anymore *interesting* numbers like this?

by interesting i mean that its not 11/11, since you can obviously cross out the 1's and get 1/1. the numbers have to be different

also, are there any 3 digit ones where you can cross out 2 of the digits? (etc, etc)
 
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  • #2
Program:
Code:
Private Sub Form_Load()
Dim x As Single
Dim z As Single
Dim y As Single
    For x = 1 To 1000
    For z = 1 To 1000
        If 10 * x / z <> 1 Then
            y = 9 * x / (10 * x / z - 1)
            If y = CLng(y) And y > 0 And (y <> x Or y <> z) Then
                If CSng(x & y) / CSng(y & z) = x / z Then
                    Debug.Print x & ", " & z & ", " & y & ": " & x & y & "/" & y & z & "=" & x & "/" & z
                End If
            End If
        End If
    Next z
    Next x
End Sub

Results:
1, 4, 6: 16/64=1/4
1, 5, 9: 19/95=1/5
2, 5, 6: 26/65=2/5
4, 8, 9: 49/98=4/8

There are no 3 digit non-trivial (x=y=z) cases (at least for x and z, possibly for y).
 
  • #3
thanks a lot for all the help. :)
 

FAQ: Are There More Interesting Numbers Like This?

What makes a number interesting?

A number is considered interesting if it possesses unique properties or characteristics that make it stand out from other numbers. This can include being prime, perfect, or having interesting patterns or sequences.

How do you determine if a number is interesting?

There is no definitive way to determine if a number is interesting as it often depends on personal opinions and preferences. However, some common factors that can make a number interesting include its divisibility, relationship to other numbers, and appearance in mathematical formulas or patterns.

Are there infinite interesting numbers?

It is believed that there are an infinite number of interesting numbers. As mathematics is constantly evolving and new discoveries are made, it is possible that there are still many interesting numbers waiting to be discovered.

What is the most interesting number known to date?

The most interesting number known to date is likely a matter of opinion. Some may argue that the number 0 is the most interesting due to its unique properties and its role as a placeholder in our number system. Others may argue for numbers like pi or e, which have significant roles in mathematics and appear in many important formulas and equations.

Are there any real-world applications for interesting numbers?

While interesting numbers may seem like a purely theoretical concept, they actually have many real-world applications. For example, prime numbers are used in cryptography to ensure secure communication, and Fibonacci numbers can be found in nature in the growth patterns of plants and animals. Additionally, interesting numbers often serve as the basis for mathematical theories and advancements in various fields.

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