Squareroots & Cuberoots Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16

7365 + $(5.4)^2 + √{?}$ = 7437.16

a) 1681

b) 1894

c) 1764

d) 2025

e) None of these

Question : 17

What is the least number to be added to 2000 to make it a perfect square?

a) 64

b) 25

c) 36

d) 49

e) None of these

Question : 18

The least number to be subtracted from 24136 to make it a perfect square

a) 111

b) 155

c) 156

d) None of these.

Answer: (a)

Let us extract the square root from 24136.

∴ 24136, is 111 more than $(155)^2$ .

So if we subtract 111 from 24136, we will get a perfect sq. number.

Question : 19

$√3100 × √567 ÷ √250$ = ? ÷ 8

a) 670

b) 620

c) 770

d) 750

e) 700

Question : 20

Area of a square field is 22500 m2 . A man cycles along its boundary at 15 km/ hr. The time will be taken by a man to return to starting point, is

a) 3 min 12 sec.

b) 2 min 24 sec.

c) 4 mins.

d) None of these.