Question

EXERCISE 7.1 mm
F
1.
Find the cubes of the following numbers :
7
19
-15
29
A
2.
(a) 17
(b) - 23
(c)
(d)
Which of the following are perfect cubes :
(a) 729
(b) 2744 (c) 10648
(d) 43904
3. By what number should 17496 be divided to obtain a perfect cube?
4. By what number should 231525 be multiplied to obtain a perfect cube?
5. Is 40500 a perfect cube? If not
(a) by what number should 40500 be multiplied to obtain a perfect cube?
(b) by what number should 40500 be divided to obtain a perfect cube?
CUBE ROOTS
We have to find a number which when multiplied by itself thrice, gives 27 or
x3 = 27
33 = 3 x 3 x 3 = 27
NOT
Cu
the​

Answer 1

Answer:

F

1.

Find the cubes of the following numbers :

7

19

-15

29

A

2.

(a) 17

(b) - 23

(c)

(d)

Which of the following are perfect cubes :

(a) 729

(b) 2744 (c) 10648

(d) 43904

3. By what number should 17496 be divided to obtain a perfect cube?

4. By what number should 231525 be multiplied to obtain a perfect cube?

5. Is 40500 a perfect cube? If not

(a) by what number should 40500 be multiplied to obtain a perfect cube?

(b) by what number should 40500 be divided to obtain a perfect cube?

CUBE ROOTS

We have to find a number which when multiplied by itself thrice, gives 27 or

x3 = 27

33 = 3 x 3 x 3 = 27

27 is answer...