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![[Class 7] You can try this method for these pairs of numbers 90 & 150 - Efficient Procedures for HCF and LCM](https://cdn.teachoo.com/f69be9cd-8107-4c9e-b4c2-a443b38ef03f/slide57.jpg)
Question (a) - Page 62 (Try this) - Efficient Procedures for HCF and LCM - Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II)
Last updated at January 23, 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
- 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 (a) - Page 62 (Try this) You can try this method for these pairs of numbers. (a) 90 and 150Let’s do this Thus, HCF = 10 × 3 = 30 LCM = (10 × 3) × (3 × 5) = 30 × 15 = 450
