91. To get the number in the fourth column, you add the numbers in column 1 and 2, then multiply by the number in column 2. f(n,m) = (n + m) * m
For example, f(2,3) = (2 + 3) * 3 = 15. Thus f(6,7) = (6 + 7) * 7 = 91
Well, this one is a bit dubious. By dismissing columns 3 and 5, you can come up with plenty of different solutions. Like 67: there is a pattern in columns 4 and 5, column 5-4 = -3, -8, -15, -24. This has pattern +5, +7, +9, +11 so the next one is +11. And 56 + 11 = 67.
3 Comments on "Two Three Four Fifteen"
NEIL WILSON says
January 12, 2016 @ 01:35
91, the answer is acheived by adding the first two numbers together and multiplying by the second number.
i.e (2+3)x3=15, (3+4)x4=28 etc
Harm says
April 25, 2016 @ 04:19
Well, this one is a bit dubious. By dismissing columns 3 and 5, you can come up with plenty of different solutions. Like 67: there is a pattern in columns 4 and 5, column 5-4 = -3, -8, -15, -24. This has pattern +5, +7, +9, +11 so the next one is +11. And 56 + 11 = 67.
Ed says
April 13, 2017 @ 01:07
well i dont see any nines in there like at all
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