![[Class 7] Find the common factors and the HCF of the numbers 140, 275 - Finding HCF using Prime Factorisation](https://cdn.teachoo.com/e8416904-5035-4bdc-b22c-a8e16f2b8a06/slide68.jpg)
Question (b) - Page 53 (Figure it out) - Finding HCF using Prime Factorisation - Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)
Last updated at January 22, 2026 by Teachoo
Finding HCF using Prime Factorisation
Finding HCF using Prime Factorisation
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Class 7 (Ganita Prakash 1, 2 & old NCERT)
Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)
- The Greatest of All
- Prime Factorisation
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Finding HCF using Prime Factorisation
- Figure it out - Page 54
- Least, but not Last!
- Finding LCM using Prime Factorisation
- Patterns, Properties, and a Pretty Procedure!
- Figure it out - Page 59
- Miscellenaous Questions on HCF, LCM
- Efficient Procedures for HCF and LCM
- Property Involving both the HCF and the LCM
- Figure it out - Page 63, 64
Transcript
Question (b) - Page 53 (Figure it out) Find the common factors and the HCF of the following numbers: (b) 140, 275Let’s find Prime Factorisation of both 140 & 275 Now, 140 = 2 × 2 × 5 × 7 275 = 5 × 5 × 11 HCF of 140, 275 = 5
