Question

The LCM and HCF of two numbers are 1920 and 16 respectively. If one of the number is 128. Then what will be the other number?
1. 360
2. 240
3. 120
4. 480

Answer 1

Correct Answer - Option 2 : 240

Given:

LCM of two numbers = 1920

HCF of two numbers = 16

One number = 128

Formula Used:

Product of two numbers = LCM × HCF

Calculation:

Let the other number be x.

According to the question, 

Product of two numbers = LCM × HCF

⇒ 128 × x = 1920 × 16

⇒ 8 × x =  1920

⇒ x = 1920/8

⇒ x = 240

∴ The other number will be 240.