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If 1 * 2 = 32; 4 * 3 = 712; 4 * 7 = 1128, then 5 * 1 = ?

If 1 * 2 = 32; 4 * 3 = 712; 4 * 7 = 1128, then 5 * 1 = ?the answer is 65 , can anybody explain me how to solve these type of puzzles, and how we get 65 ,if there is any method than plz suggest , also tell me these type of questions comes in which category of aptitude questions..?

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You just have to look for the pattern in each equation/answer.

In this case the first number in the "answer" is the sum of the two numbers in the "equation", and the second number is the product of the two numbers. So...

1*2=32... 1+2=3 and 1x2=2... so 32

4*3=712... 4+3=7 and 4x3=12... so 712

4*7=1128.... 4+7=11 and 4x7=28... so 1128

5*1=65... 5+1=6 and 5x1=5... so 65

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Nice Explained..
Thanks..
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can you suggest me , any site , from where i can practice these type of puzzles..
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You are very welcome!! :)

I don't really know any sites, but maybe look up "number pattern puzzles" or something like that.
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