36 = 6 9 × 4 = 3 × 2 = 6 36 = 9 × 4 81 = _____ 9 × 9 = _____ × _____ = _____ 81 = 9 × 9

Given: 36 = 6 ........(i) 9 × 4 = 3 × 2 = 6 ......(ii) We have 36 = 6 9 × 4 = 6 Hence, 36 is equal to 9 × 4 Now, 81 = 9 2 = 9 .......(iii) 9 × 9 = 3 × 3 = 9 .....(iv) From (iii) and (iv) we get, 81 = 9 × 9

144 = _ _ _ _ 9 × 16 = _ _ _ _ × _ _ _ _ = _ _ _ _ 144 = 9 × 16 144 = _ _ _ _ 36 × 4 = _ _ _ _ × _ _ _ _ = _ _ _ _ 144 = 36 × 4

Given: 144 = _ _ _ _ ........(i) 9 × 16 = _ _ _ _ × _ _ _ _ = _ _ _ _ ......(ii) We have 144 = 12 9 × 16 = 3 × 4 = 12 Hence, 144 is equal to 9 × 16 Now, 144 = 12 2 = 12 .......(iii) 36 × 4 = 6 × 2 = 12 .....(iv) From (iii) and (iv) we get, 144 = 36 × 4

100 = _ _ _ _ 25 × 4 = _ _ _ _ × _ _ _ _ = _ _ _ _ 100 = 25 × 4 1225 = _ _ _ _ 25 × 49 = _ _ _ _ × _ _ _ _ = _ _ _ _ 1225 = 25 × 49

Given: 100 = _ _ _ _ ........(i) 25 × 4 = _ _ _ _ × _ _ _ _ = _ _ _ _ ......(ii) We have 100 = 10 25 × 4 = 5 × 2 = 10 Hence, 100 is equal to 25 × 4 Now, 1225 = 35 2 = 35 .......(iii) 25 × 49 = 5 × 7 = 35 .....(iv) From (iii) and (iv) we get, 1225 = 25 × 49

E M B I B E

Standard Eight Mathematics>Chapter 1 - Numbers>Think

Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 21: Think

Author:Tamil Nadu Board

Tamil Nadu Board Mathematics Solutions for Exercise - Tamil Nadu Board Solutions for Chapter: Numbers, Exercise 21: Think

Attempt the free practice questions on Chapter 1: Numbers, Exercise 21: Think with hints and solutions to strengthen your understanding. Standard Eight Mathematics solutions are prepared by Experienced Embibe Experts.