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5x7


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#1 unreality

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Posted 13 July 2007 - 02:38 PM

When 5x7 = 13...

what's 5x8?


(I thought of a bunch of problems along this line, this is the simplest)
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#2 unreality

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Posted 13 July 2007 - 02:57 PM

that was (1)...


2) When 1+3+3 = 13, what is x?

2(x-2) = 1.5x+1
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#3 unreality

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Posted 13 July 2007 - 03:00 PM

i will give the answer for both, but it only makes sense if you know what you're doing. These answers are more like hints...

1)5x8 = 18

2)x=22

The question is... why?
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#4 unreality

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Posted 15 July 2007 - 11:48 PM

looks like nobody knows so:

a) 5x7 = 13 and 5x8 = 18 because its base 32

b) 7=13 and 10=22 because its base 4
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