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The LCM of two numbers is 1920 and their HCF is 16. If one of the numbers is 128, find the other number.
1. 320
2. 260
3. 240
4. 204

1 Answer

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Best answer
Correct Answer - Option 3 : 240

Given:

LCM = 1920

HCF = 16

First number = 128

Concept used:

If 'a' and 'b' are two numbers, then LCM × HCF = a × b

Calculations:

Let the first number be 'a' and second number be 'b'.

⇒ LCM × HCF = a × b

⇒ 1920 × 16 = 128 × b

⇒ b = (1920 × 16)/128

⇒ b = 240

∴ The other number is 240.

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