Toughest Brain Twister Question

T

Tomasz Budzeń

A B C=A-B C(n) - C(n-1)

2 + 3 = 8 2*3 = 6 2 4
3 + 7 = 27 3*7 = 21 6 6
4 + 5 = 32 4*5 = 20 12 8
5 + 8 = 60 5*8 = 40 20 10
6 + 7 = 72 6*7 = 42 30 12
7 + 8 = ?? 7*8 = 56 (42)

So, the answer is 7 + 8 = (56+42) = 98

Why do you call it hard ? Do you know Pascal difference machine :) ?

Regards,
Tomasz Budzeń
 

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