WBCS.LIVE practice question

Two numbers are in the ratio 3 : 5 and their HCF is 20. Their LCM is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 30
  2. 100
  3. 60
  4. 300

Correct answer and explanation

Correct answer: 300

Explanation: āœ… Correct Answer: D. 300 šŸ“š Explanation: If the numbers are in ratio 3:5 and HCF is 20, the actual numbers are 3 x 20 = 60 and 5 x 20 = 100. The LCM of 60 and 100 is the smallest number divisible by both. LCM = 300. This can be found by multiplying the HCF by the remaining ratios: 20 x 3 x 5 = 300.