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17 replies to this topic

#1 eggy1024

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Posted 09 January 2008 - 07:55 AM

a friend sent me this puzzle, and it has me stumped.

what comes next? 4.7 12.1 13.22

thanks for your help!
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#2 Ken

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Posted 10 January 2008 - 05:46 AM

17.4?

I f that's not it I'm not sure if it can even be possible. Sorry.
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#3 birdbrain

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Posted 10 January 2008 - 07:40 AM

The answer is 35.35

If you wrote the numbers down correctly, then the solution is simply to add each number to itself, only you reverse the numbers on each side of the decimal. For example: 4.7 + 7.4 = 12.1

This would mean the sequence would go like this: 4.7 12.1 13.22 35.35 (which is 13.22 + 22.13).

You're welcome B)

Edited by birdbrain, 10 January 2008 - 07:44 AM.

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#4 bonanova

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Posted 11 January 2008 - 10:18 PM

Nice ... !
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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
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#5 The Waco Kid

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Posted 13 March 2008 - 06:18 PM

It does seem that, in fact, you reverse the numbers for each side of the decimal. So, it would not be 35.35, rather 35.53.
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#6 **BrItTaNy**

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Posted 13 March 2008 - 08:58 PM

a friend sent me this puzzle, and it has me stumped.

what comes next? 4.7 12.1 13.22

thanks for your help!



<_< I believe the next two numbers would be 22.13 and 31.04. Some one message me and let me know if i'm right or wrong and if I'm wrong let me know the correct answers. Thanks!
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#7 jword

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Posted 14 March 2008 - 12:17 AM

It does seem that, in fact, you reverse the numbers for each side of the decimal. So, it would not be 35.35, rather 35.53.

So would youre next number be 70.7 or 89.06
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#8 davasatoth

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Posted 14 March 2008 - 01:34 AM

4.7 12.1 13.22...
4.7+7.4=12.1
12.1+1.12=13.22
13.22+22.13=35.35
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#9 davasatoth

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Posted 14 March 2008 - 01:35 AM

<_< I believe the next two numbers would be 22.13 and 31.04. Some one message me and let me know if i'm right or wrong and if I'm wrong let me know the correct answers. Thanks!


22.13 is what you add to 13.22 to get the next number
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#10 andreay

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Posted 26 March 2008 - 06:28 PM

It does seem that, in fact, you reverse the numbers for each side of the decimal. So, it would not be 35.35, rather 35.53.


If you reverse the numbers either side of the decimal then you would end up with 12.1 + 21.1 = 33.2 NOT 13.22

Andy
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