Explore topic-wise MCQs in Aptitude.

This section includes 456 Mcqs, each offering curated multiple-choice questions to sharpen your Aptitude knowledge and support exam preparation. Choose a topic below to get started.

351.

If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their squares is :

A. 12
B. 28
C. 80
D. 160
Answer» E.
Discussion
352.

The smallest number added to 680621 to make the sum a perfect square is :

A. 4
B. 5
C. 6
D. 8
Answer» B. 5
Discussion
353.

The smallest positive integer, when multiplied by 392, the product is a perfect square, is

A. 6
B. 5
C. 3
D. 2
Answer» E.
Discussion
354.

The smallest number that must be subtracted from 1000 to make the resulting number a perfect square is

A. 37
B. 38
C. 39
D. 40
Answer» D. 40
Discussion
355.

How many perfect squares lie between 120 and 300 ?

A. 5
B. 6
C. 7
D. 8
Answer» D. 8
Discussion
356.

The square root of a positive number less than 100 lies between :

A. 0 and 1000
B. 0 and 10
C. 10 and 10
D. 100 and 100
Answer» D. 100 and 100
Discussion
357.

The number of perfect square numbers between 50 and 1000 is

A. 21
B. 22
C. 23
D. 24
Answer» E.
Discussion
358.

The largest number of five digits, which is a perfect square is

A. 99999
B. 99976
C. 99856
D. 99764
Answer» D. 99764
Discussion
359.

The smallest number which should be added to the number 8958 so that the result is a perfect square is

A. 69
B. 67
C. 77
D. 79
Answer» C. 77
Discussion
360.

What number must be added to the expression 16a

A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">4</td></tr></table>
B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>11</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>
C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>
D. 16
Answer» B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>11</center></td></tr><tr><td style="text-align: center;">2</td></tr></table>
Discussion
361.

If the number p is 5 more than q and the sum of the squares of p and q is 55, then the product of p and q is

A. 10
B. 10
C. 15
D. 15
Answer» D. 15
Discussion
362.

The greatest 4 digit number which is a perfect square, is

A. 9999
B. 9909
C. 9801
D. 9081
Answer» D. 9081
Discussion
363.

The least integer which should be added to 1000 so as to make it a perfect square is

A. 10
B. 18
C. 24
D. 89
Answer» D. 89
Discussion
364.

The number, whose square is equal to the difference of the squares of 75.15 and 60.12, is

A. 46.09
B. 48.09
C. 45.09
D. 47.09
Answer» D. 47.09
Discussion
365.

How many positive integers less than 1000 are multiples of 11 whose square roots are whole numbers.

A. 2
B. 4
C. 8
D. 11
Answer» B. 4
Discussion
366.

Three fifth of the square of a certain number is 126.15. What is the number?

A. 210.25
B. 75.69
C. 14.5
D. 145
Answer» D. 145
Discussion
367.

The sum of the squares of two numbers is 386. If one of the number is 5, the other will be :

A. 18
B. 19
C. 15
D. 20
Answer» C. 15
Discussion
368.

The product of two whole numbers is 37. The square root of the difference of the numbers is

A. 8
B. 7.5
C. 6
D. 4.5
Answer» D. 4.5
Discussion
369.

There are some boys and girls in a room. The square of the number of the girls is less than the square of the number of boys by 28. If there were two more girls, the number of boys would have been the same as that of the girls. The total number of the boys and girls in the room are

A. 56
B. 14
C. 10
D. 7
Answer» C. 10
Discussion
370.

If the product of four consecutive natural numbers increased by a natural number p, is a perfect square; then the value of p is

A. 8
B. 4
C. 2
D. 1
Answer» E.
Discussion
371.

The smallest 4-digit number, which is a perfect square, is

A. 1009
B. 1016
C. 1024
D. 1025
Answer» D. 1025
Discussion
372.

The digit at unit s place of the number (1570)

A. 4
B. 1
C. 2
D. 3
Answer» B. 1
Discussion
373.

One-third of the square root of which number is 0.001 ?

A. 0.0009
B. 0.000001
C. 0.00009
D. None of the above
Answer» E.
Discussion
374.

If the sum of two numbers is 22 and the sum of their squares is 404, then the product of the numbers is :

A. 40
B. 44
C. 80
D. 88
Answer» B. 44
Discussion
375.

The square root of 0.324 0.081 4.624 is 1.5625 0.0289 72.9 64

A. 24
B. 2.4
C. 0.024
D. 1.2
Answer» D. 1.2
Discussion
376.

If the square root of 841 is 29, then 0.00000841 is equal to :

A. 0.029
B. 0.0029
C. 0.00029
D. 0.29
Answer» C. 0.00029
Discussion
377.

The number of digits in the square root of 625686734489 is

A. 4
B. 5
C. 6
D. 7
Answer» D. 7
Discussion
378.

The number of pairs of natural numbers, the difference of whose squares is 45 will be

A. 2
B. 3
C. 6
D. 5
Answer» C. 6
Discussion
379.

The value of 0.064 0.256 15.625 is0.25 0.625 4.096

A. 2
B. 2.4
C. 0.24
D. 4.2
Answer» B. 2.4
Discussion
380.

Number of digits in the square root of 62478078 is:

A. 4
B. 5
C. 6
D. 3
Answer» B. 5
Discussion
381.

The square root of 2151 is 169

A. <table><tr><td rowspan="2">5</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>8</center></td></tr><tr><td style="text-align: center;">13</td></tr></table>
B. <table><tr><td rowspan="2">4</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>8</center></td></tr><tr><td style="text-align: center;">13</td></tr></table>
C. <table><tr><td rowspan="2">4</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><tr><td style="text-align: center;">13</td></tr></table>
D. <table><tr><td rowspan="2">5</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td></tr><tr><td style="text-align: center;">13</td></tr></table>
Answer» C. <table><tr><td rowspan="2">4</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><tr><td style="text-align: center;">13</td></tr></table>
Discussion
382.

If (1101)

A. 110.1
B. 11.01
C. 1.101
D. 11.001
Answer» C. 1.101
Discussion
383.

The simplified value of 32 + 48 is 8 + 12

A. 3
B. 2
C. 6
D. 4
Answer» C. 6
Discussion
384.

If (10.15)

A. 1025 15
B. 103 515
C. 102 515
D. 102 0515
Answer» D. 102 0515
Discussion
385.

0.49 + 0.81 is equal to : 0.250.36

A. <table><tr><td rowspan="2">7</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">10</td></tr></table>
B. <table><tr><td rowspan="2">2</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">10</td></tr></table>
C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">10</td></tr></table>
D. <table><tr><td rowspan="2">9</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">10</td></tr></table>
Answer» C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>9</center></td></tr><tr><td style="text-align: center;">10</td></tr></table>
Discussion
386.

The positive square root of [0.6 0.6 0.6 + 0.4 0.4 0.4 + 3 0.6 0.4] is equal to

A. 2.1736
B. 1
C. 0.21736
D. 0.072
Answer» C. 0.21736
Discussion
387.

The value of 4 216 is close to 4 + 0.4

A. 0.4
B. 0.8
C. 1.0
D. 1.4
Answer» C. 1.0
Discussion
388.

What is the square root of 0.09?

A. 0.3
B. 0.03
C. 0.003
D. 3.0
Answer» B. 0.03
Discussion
389.

0.009 0.036 0.016 0.08 is equal to 0.002 0.0008 0.0002

A. 34
B. 36
C. 38
D. 39
Answer» C. 38
Discussion
390.

0.081 0.484 is equal to 0.0064 6.25

A. 9
B. 0.9
C. 99
D. 0.99
Answer» E.
Discussion
391.

(3.63)2 (2.37)2 is simplified to 3.63 + 2.37

A. 6
B. 1.36
C. 2.26
D. 1.26
Answer» E.
Discussion
392.

The value of (75.8)2 (55.8)2 is :20

A. 20
B. 40
C. 121.6
D. 131.6
Answer» E.
Discussion
393.

The value of 0.051 0.051 0.051 + 0.041 0.041 0.041 is :0.051 0.051 0.051 0.041 + 0.041 0.041

A. 0.92
B. 0.092
C. 0.0092
D. 0.00092
Answer» C. 0.0092
Discussion
394.

The value of (6.1)2 + (61.1)2 + (611.1)2 is :(0.61)2 + (6.11)2 + (61.11)2

A. 0.1
B. 1.1
C. 10
D. 100
Answer» D. 100
Discussion
395.

The value of (0.1)2 + (0.01)2 + (0.009)2 is :(0.01)2 + (0.001)2 + (0.0009)2

A. 10
B. <sup>2</sup>
C. 10
D. 0.1
E. 0.01
Answer» C. 10
Discussion
396.

The value of 80 112 is: 45 63

A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><tr><td style="text-align: center;">4</td></tr></table>
B. <table><tr><td rowspan="2">1</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td></tr><tr><td style="text-align: center;">4</td></tr></table>
C. <table><tr><td rowspan="2">1</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td></tr><tr><td style="text-align: center;">3</td></tr></table>
D. <table><tr><td rowspan="2">1</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td></tr><tr><td style="text-align: center;">9</td></tr></table>
Answer» D. <table><tr><td rowspan="2">1</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td></tr><tr><td style="text-align: center;">9</td></tr></table>
Discussion
397.

The value of (0.03)2 (0.01)2 is:0.03 0.01

A. 0.02
B. 0.004
C. 0.4
D. 0.04
Answer» E.
Discussion
398.

Simplification of (3.4567)2 (3.4533)2 yields the result :0.0034

A. 6.91
B. 7
C. 6.81
D. 7.1
Answer» B. 7
Discussion
399.

On simplification of (2.644)2 (2.356)2 we get :0.288

A. 1
B. 4
C. 5
D. 6
Answer» D. 6
Discussion
400.

Assume that

A. 36.164
B. 36.304
C. 37.304
D. 37.164
Answer» D. 37.164
Discussion