Maths - LCM and HCF
11. Three numbers are in the ratio of 3 : 4 : 5 and their LCM is 2400. Their HCF is
- Option : C
- Explanation : (C) Let the numbers be 3x, 4x and 5x.
Then, their LCM =60x
So, 60x = 2400 => x = 40
⇒ The numbers are (3 × 40), (4 × 40) and(5 × 40).
Hence, required HCF = 40
- Option : C
- Explanation : Let the numbers be 3x and 4x
and LCM of (3x and 4x) = 84
=> 12x = 84
=> x = 7
So, numbers are 21 and 28.
Larger number =28.
