Mental Ability - Questions

1 .
Three of the following four are alike in a certain way and hence form a group. Which is the one that does not belong to that group?
A)
40
B)
68
C)
110
D)
152

Correct Answer : Option (D) - 152

2 .
The following equation is incorrect. Which two signs should be interchanged to correct the equation?
 
6 x 18 + 40 ÷ 30 - 10 = 20
A)
- and +
B)
+ and ÷
C)
+ and x
D)
÷ and x

Correct Answer : Option (C) - + and x

3 .
Arrange the given words in the sequence in which they occur in the dictionary.
1. Pragmatic
2. Protect
3. Pastel
4. Postal
5. Pebble
A)
34512
B)
35412
C)
43521
D)
43512

Correct Answer : Option (B) - 35412

4 .
Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 
 
Assertion(A)   :   An iron ball floats on mercury but gets immersed in water. 
 
Reason (R)     :   The specific gravity of iron is more than that of mercury.
A)
Both A and R are true and R is the correct explanation of A.
B)
Both A and R are true but R is NOT the correct explanation of A.
C)
A is false but R is true.
D)
A is true but R is false.

Correct Answer : Option (D) - A is true but R is false.

Explanation : Iron with specific gravity less than that of mercury but more than that of water, floats in the former but gets immersed in the second

5 .
What should come in place of the question mark (?) in the following number series? 8, 6, 9, 23, ?
A)
35
B)
49
C)
62
D)
87

Correct Answer : Option (D) - 87

Explanation :

Given number 8, 6, 9, 23, ?
 
The pattern of given series is :
8 x 1 - 2 = 6 6 x 2 - 3 = 9 9 x3 - 4 = 23 23 x4 - 5 = 87

6 .
In the following question :
Various terms of an alphanumerical series are given with one or more terms missing as shown by (?). 
Choose the missing terms out of the given alternatives. BMO, EOQ, HQS, ?
A)
SOV
B)
LMN
C)
KSU
D)
SOW

Correct Answer : Option (C) - KSU

Explanation : The first letter moves 3 steps forward. The second and third letters move 2 steps forward.

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