Question (b) - Page 51 (Figure it out) - Prime Factorisation - Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)

Transcript

Question (b) - Page 51 (Figure it out) List all the factors of the following numbers: (b) 105Let’s do Prime Factorisation of 105 So, we can write 105 = 3 × 5 × 7 Now, Factors would be Prime Factors Combination of prime factors And, number 1 Let’s look at each one of them Prime Factors: Prime Factors are 3, 5, 7 Combination of two prime factors: Factors are 3 × 5 = 15 5 × 7 = 35 3 × 7 = 21 Combination of three prime factors: Factors are 3 × 5 × 7 = 105 Thus, Factors of 105 are 1, 3, 5, 7, 15, 21, 35, 105