MATHEMATICAL INTELLIGENCE:

1. Which number should come next in this series?

25,24,22,19,15

A. 4
B. 5
C. 10
D. 14
Correct answer: C
Explanation: The pattern decreases progressively: -1, -2, -3, -4, -5

2. Which number should come next in this series?

3,5,8,13,21,

A. 4
B. 21
C. 31
D. 34
Correct answer: D
Explanation: 3+5=8, 5+8=13 and so on.

3. 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
Correct answer: A
(For each row the sum of the first two columns is equal to the multiple of the last two columns)

4. 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

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.)