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iq Test # 4
16.
What number should replace the question mark?
6
5
7
8
4
Explanation:
The number in the third row = (the number in the first row is multiplied by the number of the second row) + 2 to the power of the column number. (16 = 2 × 7 + 2; 31 = 3 × 9 + 4; 48 = 5 × 8 + 8; 71 = 5 × 11 + 16).