Question

62
Excellence in Mathematics ---Vill
6. Find the square roots of the following decimals :
(i) 5.76
(ii) 146.8944
(iii) 1.4641
(iv) 2052.09
(v) 225.360144
(vi) 964.288809
7. Find the smallest number by which each of the following numbers must be multiplied
so that the product becomes a perfect square :
(i) 48
(ii) 1008
8. What must be subtracted from 4562 to get a perfect square ?
Also, find the square root of this perfect square.
9. Find the least number which must be added to 4562 to make it perfect square.
10. Find the greatest perfect square of 5-digit number.
11. Find the smallest number by which 3888 must be multiplied so that the product
becomes a perfect square.
12. Find the smallest number by which 235445 must be divided so that it becomes a
perfect square. Also, find the square root of the perfect square so obtained.
13. Find the least square number which is exactly divisible by 8, 9 and 10.
Hint:
LCM of 8, 9 and 10 is 360, which is not a perfect square.
360 = 2 x 2 x 3 x 3 x 2 x 5
Therefore, to make it a perfect square, it must be multiplied by 2 x 5 i.e. by 10.]
14. Find the least square number, which is exactly divisible by each one of the numbers
12, 15, 18.
15. Find the least number which must be subtracted from 15440 to make it a perfect
square.​

Answer 1

Answer:

using

ased on Table 9.3, how many times is a spaceship as fast as an aeroplane?

What are other examples of speeds which can be encountered in real life?

resent your findings to the class.

Round off 67893.989

to nearest co

OXFORD

UNIVERSITE PRESS

Chapter 9

Ratio, Rate, Time and Speed

(c) 1000

2. In 2010, Singapore welcomed 11 600 000

rounded off to the nearest 100 000. What

numbers of overseas visitors?

OXFORD

UNIVERSITY PRESS

YT

Answer 2

what do you mean I will give you answer for this I am asking for you and manage lady sir