Chapter 3: Playing With Numbers Exercise 3.2 Q1. What is the sum of any two: (a) Odd numbers. (b) Even numbers. Answer. (a) The sum of any two odd numbers is an even number. Example: 1 + 7 = 8, 7 + 5 = 12 (b) The sum of any two even numbers is also an … Read more

Exercise 3.3 Q1. Using divisibility test, determine which of the following numbers are divisible by 2; by 3; by 4; by 5; by 6; by 8; by 9; by 10; by 11. (Say yes or no) Answer. Number Divisible by 2 3 4 5 6 8 9 10 11 128 Yes No Yes No No … Read more

Chapter 3: Playing With Numbers Exercise 3.4 Q1. Find the common factors of: (a) 20 and 28 (b) 15 and 25 (c) 35 and 50 (d) 56 and 120 Answer. (a) Factors of 20 = 1, 2, 4, 5, 10, 20 Factors of 28 = 1, 2, 4, 7, 14, 28 Common factors = 1, 2, … Read more