Indices Class 7 Maths Chapter 6 Practice Set 29 Solutions Maharashtra Board

Indices Class 7 Maths Chapter 6 Practice Set 29 Solutions Maharashtra Board

Std 7 Maths Practice Set 29 Solutions Answers

Question 1.
Simplify:
i. [(1512)3]4
ii. (34)-2
iii. [(17)−3]4
iv. [(25)−2]−3
v. (65)4

Maharashtra state board textbooks

vi. [(67)5]2
vii. [(23)−4]5
viii. [(58)3]−2
ix. [(34)6]7
x. [(25)−3]2
Solution:
i. [(1512)3]4
=(1512)3×4=(1512)12

ii. (34)-2
= 34×(-2)
= 3-8

iii. [(17)−3]4
=(17)(−3)×4=(17)−12

iv. [(25)−2]−3
=(25)(−2)×(−3)=(25)6

v. (65)4
= 65×4
= 620

vi. [(67)5]2
=(67)5×2=(67)10

vii. [(23)−4]5
=(23)(−4)×5=(23)−20

viii. [(58)3]−2
=(58)3×(−2)=(58)−6

ix. [(34)6]7
=(34)6×1=(34)6

x. [(25)−3]2
=(25)(−3)×2=(25)−6

Question 2.
Write the following numbers using positive indices:
i. (27)−2
ii. (113)−5
iii. (16)−3
iv. (y)−4
Solution:
i. (72)2
ii. (311)5
iii. 63
iv. 1y4