Mathematical Intelligence Interview Question:

Which number should replace the question mark?

8 5 21
35 32 12
32 28 31
4 ? 28
A. 3
B. -2
C. -6
D. 48

Submitted by: Administrator

Correct answer: C

(For each row subtract the second column from the first column. The result is equal to the sum of the digits in the last column.)
Submitted by: Administrator