Mathematical Intelligence Question:
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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

Answers:

Answer #1
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.)

Answer #2
C.-6
8-5=3
2+1=3 ..........
so 4-?=2+8=10
result is 4-10=-6.

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Previous QuestionNext Question
Which number should come next in this series?

25,24,22,19,15

A. 4
B. 5
C. 10
D. 14
Which number should replace the question mark?


17 8 5 5
13 7 5 4
6 12 6 3
10 6 4 ?


A. 4
B. 5
C. 6
D. 7