Question

Chapter-1

Squares and Square Roots

Which of them is a perfect square? a) 576 b)941 c)65 d)none

Which of the following is not a perfect square?

a)62500 b)57600 c)90000 d)63147

3. Which of the following will have 4 at units place?

a)14 b)62 c)27 d)35²

4. By observing the digits at ones place, tell which of the following can be perfect square

a)100 b)927 c)625 d)576

If one number of the Pythagorean triplet is 2m then the other a)m, m²+1 b)m²+1,m²³-1 c)m²m²+1 d)m, m²

5.

6. How many natural numbers lie between 5 and6"?

a)9 b)10 c)11 d)12

7. Which of the following triplets are Pythagorean?

a)(8,15,17) b)(12,35,38) c) (14,48,51) Which of the following is the square root of 7056? 8.

a) 86 b) 34 c) 54 d) 84 Find the squares of the following numbers 9.

1)25 30 12

10. Find how many non-square number lie between the following pair of numbers i)100 and 121

ii)8 and 9³ 30 and 31

11. Find the square root of the following numbers by repeated subtraction method 225 iv)196

19 121

12. Find the square root by prime factorisation

1) 64 )289 36 iv)1764

13. Can a right triangle with sides 6cm, 8cm and 10cm be formed, give reason.

14. Find the smallest number by which 147 must be multiplied so that it becomes a perfect square.

Also, find the square root of the number so obtained.

two are

1​

Answer 1

Answer:

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