Question

(VI) 20
(iii) 16
(ii) 10
(iv) 20
(V) 30
(vii) 200 (viii) 1000
2. Which of the following numbers are perfect cubes :
(i) 729 (ii) 8 (iii) 64 (iv) 27000 (v) 9241 (vi) 25
(vii) 216 (viii) 256
3. Which of the following are the cubes of even natural numbers ?
216, 729, 1331, 1000, 2744
4. Which of the following are the cubes of odd natural numbers ?
64, 74088, 27,1331, 1000000
5. Find the smallest number by which 3087 may be multiplied so that the product is a perfect cube
5. What is the smallest number by which 392 may be divided so that the quotient is a perfect cube
7. What is the smallest number by which 1323 may be multiplied so that the product is a perfect cu
7. By which smallest number must the number 8788 be divided so that the quotient is a perfect cut
Prove that if a number is trebled then its cube is 27 times the cube of the given number.
BE ROOTS
The cube root of a number x is that number
pse cube gives x.
The cube root of x is denoted by the
bolx.
18 = 2
127 = 3
V64 = 4
3125 = 5
3/216 = 6
V343 = 7
Aarti's Modern Mathematic
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Answer 1

2.(I) 729

(ii) 8

I have only answered qno 2.