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![[Class 7] Find the HCF of numbers (b) 42, 75, 24 - Ganita Prakash II - Figure it out - Page 54](https://cdn.teachoo.com/74a90bfe-eb62-40f1-b30f-34857290bd56/slide74.jpg)
Question 1(b) - Figure it out - Page 54 - Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)
Last updated at January 22, 2026 by Teachoo
Class 7 (Ganita Prakash 1, 2 & old NCERT)
Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)
- The Greatest of All
- Prime Factorisation
- Finding HCF using Prime Factorisation
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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 1(b) Find the HCF of the following numbers: (b) 42, 75, 24Let’s find Prime Factorisation of both 42, 75 & 24 Now, 42 = 2 × 3 × 7 75 = 3 × 5 × 5 24 = 2 × 2 × 2 × 3 HCF of 42, 75, 24 = 3
