# Aptitude Square Roots and Cube Roots Test Paper 3

11) The number which is not expressible as the square of any natural number is

1. 1369
2. 5041
3. 7056
4. 9852

Explanation:

We have

1369 = 372,

5041 = 712,

7056 = 842,

9852 = (99.2)2

All of the numbers are perfect square except the option D.

12) What is the smallest number to be subtracted from 549162 in order to make it a perfect square?

1. 28
2. 36
3. 62
4. 81

Explanation: Hence the smallest number to be subtracted is 81 to make the number a perfect square.

13) The smallest number which when multiplied to 3600 yields perfect cube is

1. 50
2. 60
3. 40
4. 100

Explanation: ∴ 3600 = 2 × 2 × 2 × 2 × 5 × 5 × 3 × 3

= 23 × 2 × 52 × 32 ∴ 3600 must be multiplied by 60 to make it perfect cube.

14) If 2*3 = √13 and 3*4 = 5, what is the value of 5*12?

1. 2. 3. 12
4. 13

Explanation:

From the above relation it is clear that 15) The value of is

1. 25
2. 125
3. 3 4. None of these.

Explanation: Aptitude Square Roots and Cube Roots Test Paper 1
Aptitude Square Roots and Cube Roots Test Paper 2
Aptitude Square Roots and Cube Roots Test Paper 4   