Quantitative Aptitude

General Questions

Quantitative Aptitude Exercise Mode

General Questions

Practice and master this topic with our carefully crafted questions.

10 Questions
15 Minutes
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Question 1

If 35 + 125 = 17.88, then what will be the value of 80 + 65 ?

A
13.41
B
20.46
C
21.66
D
22.35
Correct Answer: Option D

35 + 125 = 17.88

35 + 25 x 5 = 17.88

35 + 55 = 17.88

85 = 17.88

5 = 2.235

80 + 65 = 16 x 5 + 65

   = 45 + 65

   = 105 = (10 x 2.235) = 22.35

Question 2
The least perfect square, which is divisible by each of 21, 36 and 66 is:

A
213444
B
214344
C
214434
D
231444
Correct Answer: Option A

L.C.M. of 21, 36, 66 = 2772.

Now, 2772 = 2 x 2 x 3 x 3 x 7 x 11

To make it a perfect square, it must be multiplied by 7 x 11.

So, required number = 22 x 32 x 72 x 112 = 213444

Question 3
The cube root of .000216 is:

A
.6
B
.06
C
77
D
87
Correct Answer: Option B

(.000216)1/3 = 216 1/3
106

   = 6 x 6 x 6 1/3
102 x 102 x 102

   = 6
102

   = 6
100

   = 0.06

Question 4

1.5625 = ?

A
1.05
B
1.25
C
1.45
D
1.55
Correct Answer: Option B 
   1|1.5625( 1.25
    |1
    |-------
  22| 56
    | 44
    |-------
 245| 1225
    | 1225
    |-------
    |    X
    |-------

1.5625 = 1.25.

Question 5

What should come in place of both x in the equation :

x = 162
128 x


A
12
B
14
C
144
D
196
Correct Answer: Option A

Let x = 162
128 x

Then x2 = 128 x 162

   = 64 x 2 x 18 x 9

   = 82 x 62 x 32

   = 8 x 6 x 3

   = 144.

x = 144 = 12.

Question 6
A group of students decided to collect as many paise from each member of group as is the number of members. If the total collection amounts to ₹ 59.29, the number of the member is the group is:

A
57
B
67
C
77
D
87
Correct Answer: Option C

Money collected = (59.29 x 100) paise = 5929 paise.

Number of members = 5929 = 77.

Question 7

The square root of (7 + 35) (7 - 35) is

A
2
B
4
C
5
D
35
Correct Answer: Option A
(7 + 35)(7 - 35) = (7)2 - (35)2  

= 49 - 45  = 4  = 2.
Question 8

If a = 0.1039, then the value of 4a2 - 4a + 1 + 3a is:

A
0.1039
B
0.2078
C
1.1039
D
2.1039
Correct Answer: Option C

4a2 - 4a + 1 + 3a 

= (1)2 + (2a)2 - 2 x 1 x 2a + 3a

   = (1 - 2a)2 + 3a

   = (1 - 2a) + 3a

   = (1 + a)

   = (1 + 0.1039)

   = 1.1039

Question 9
If 5 = 2.236;
Then the value of 5 - 10 + 125 is equal to:
2 5
A
5.59
B
7.826
C
8.944
D
10.062
Correct Answer: Option B

5 - 10 + 125 = (5)2 - 20 + 25 x 55
2 5 25

= 5 - 20 + 50
25

= 35 x 5
25 5

= 355
10

= 7 x 2.236
2

= 7 x 1.118

= 7.826

Question 10

0.0169 x ? = 1.3

A
10
B
100
C
1000
D
None of these
Correct Answer: Option B

Let 0.0169 x x = 1.3.

Then, 0.0169x = (1.3)2 = 1.69

x = 1.69 = 100
0.0169

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