Class 8 SELINA Solutions Maths Chapter 2: Exponents (Powers)
Exponents (Powers) Exercise Ex. 2(A)
Solution 1(i)
Correct option: (c) 19
Solution 1(ii)
Correct option: (b) 
Solution 1(iii)
Correct option: (b) 
Solution 1(iv)
Correct option: (d) 25
Solution 2(i)
Solution 2(ii)
Solution 2(iii)
Solution 2(iv)
Solution 2(v)
Solution 2(vi)
Solution 2(vii)
Solution 2(viii)
Solution 2(ix)
Solution 2(x)
Solution 3
Therefore, m = 2 and n = 3
Solution 4
Exponents (Powers) Exercise Ex. 2(B)
Solution 1(i)
Correct option: (b) 
Solution 1(ii)
Correct option: (a) 
Solution 1(iii)
Correct option: (c) –2
Solution 1(iv)
Correct option: (a) 3
Solution 1(v)
Correct option: (d) 1
Solution 2(i)
Solution 2(ii)
Solution 2(iii)
Solution 2(iv)
Solution 2(v)
Solution 2(vi)
Solution 2(vii)
Solution 2(viii)
Solution 2(ix)
Solution 2(x)
Solution 2(xi)
Solution 2(xii)
Solution 2(xiii)
Solution 2(xiv)
Solution 2(xv)
Solution 2(xvi)
Solution 3(i)
Solution 3(ii)
Solution 3(iii)
Solution 4(i)
(–5)° = 1
Any number raised to the power zero is equal to 1.
Solution 4(ii)
8° + 4° + 2°
= 1 + 1 + 1
= 3
Solution 4(iii)
(8 + 4 + 2)°
= (14)°
= 1
Solution 4(iv)
4x°= 4(1) = 4
Solution 4(v)
(4x)° = 1
Solution 4(vi)
Solution 4(vii)
Solution 4(viii)
Solution 5(i)
Solution 5(ii)
Solution 5(iii)
Solution 5(iv)
Solution 5(v)
Solution 5(vi)
Solution 5(vii)
Solution 5(viii)
Solution 5(ix)
Solution 6
Solution 7(i)
Solution 7(ii)
Solution 8(i)
Solution 8(ii)
Solution 8(iii)
Solution 8(iv)
Solution 8(v)
Solution 8(vi)
Solution 9
Solution 10
Solution 11
Solution 12
Solution 13(i)
Solution 13(ii)
Solution 14(i)
Solution 14(ii)
Solution 15(i)
Solution 15(ii)
Solution 16(i)
Note: Back answer incorrect.
Solution 16(ii)
Note: Back answer is incorrect.
Solution 16(iii)
Solution 16(iv)
Solution 16(v)
Solution 17(i)
Note: Back answer is incorrect.
Solution 17(ii)
Solution 17(iii)
Solution 18
Solution 19
Exponents (Powers) Exercise TEST YOURSELF
Solution 1(i)
Correct option: (d) undefined
(8° + 5°)(8° – 5°) = (1 + 1)(1 – 1) = 2(0) = 0
Multiplicative inverse 
Solution 1(ii)
Correct option: (b) 1
Solution 1(iii)
Correct option: (a) 5
34 × 93 = 9n
⇒ 34 × (32)3 = (32)n
⇒ 34 × 36 = 32n
⇒ 310 = 32n
⇒ 10 = 2n
⇒ n = 5
Solution 1(iv)
Correct option: (d) 3
Solution 1(v)
Correct option: (b) 
Solution 2(i)
Solution 2(ii)
Solution 3(i)
Solution 3(ii)
Solution 4(i)
Solution 4(ii)
Solution 5(i)
Solution 5(ii)
Solution 6
Let the required number be A.
Then,
Solution 7
Solution 8
Solution 9(i)
Solution 9(ii)
