Indices Class 7 Practice Set 30 Answers Solutions Chapter 6
Question 1
Maharashtra Board Solution
Find the square root: i. 625 ii. 1225 iii. 289 iv. 4096 v. 1089
Solution & Step-by-Step Answer:
i. 625 ∴ 625 = 5 x 5 x 5 x 5 ∴ √625 = 5 x 5 = 25
ii. 1225
∴ 1225 = 5 x 5 x 7 x 7
∴ √1225 = 5 x 7 = 35
iii. 289
∴ 289 = 17 x 17
∴ √289 = 17
iv. 4096
∴ 4096 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2
∴ √4096 = 2 x 2 x 2 x 2 x 2 x 2
= 64
v. 1089
∴ 1089 = 3 x 3 x 11 x 11
∴ √1089 = 3 x 11
= 33
Maharashtra Board Class 7 Maths Chapter 6 Indices Practice Set 30 Intext Questions and Activities
Question 1
Maharashtra Board Solution
Try to write the following numbers in the standard form. (Textbook pg. no. 48) i. The diameter of Sun is 1400000000 m. ii. The velocity of light is 300000000 m/sec.
Solution & Step-by-Step Answer:
i. 1400000000 m = 1.4 x 109 m ii. 300000000 m/s = 3.0 x 108 m/sec.
Question 2
Maharashtra Board Solution
The box alongside shows the number called Googol. Try to write it as a power of 10. (Textbook pg. no. 48)
Solution & Step-by-Step Answer:
1 x 10100