Question (e) - Page 53 (Figure it out) - Finding HCF using Prime Factorisation - Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)

Last updated at August 14, 2026 by

[Class 7] Find the common factors and the HCF of the numbers: 81, 243 - Finding HCF using Prime Factorisation

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Question (e) - Page 53 (Figure it out) Find the common factors and the HCF of the following numbers: (e) 81, 243Let’s find Prime Factorisation of both 81 & 243 Now, 81 = 3 × 3 × 3 × 3 243 = 3 × 3 × 3 × 3 × 3 HCF of 81, 243 = 3 × 3 × 3 × 3 = 81

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