number puzzle

divide each number on the left in the middle. For example, treat 2651 as 26 and 51.

Sum first two numbers to get the first digit of the result. Sum last two numbers to get the last digit of the result number.

Solution:

2651 = 86 (2+6 5+1)
3342 = 66 (3+3 4+2)
9017 = 98 (9+0 1+7)
6113 = 74 (6+1 1+3)

The correct answer is therefore 74.

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