SSC GD 2021 PYQ — Question 64

SSC GD Constable (English) - 2nd December 2021 Shift 3 • Quantitative Aptitude • Q64

LCM of two prime numbers x and y (x > y) is 253. The difference between the numbers x and y is:

Show answer & explanation

Correct answer: D

Explanation

The correct answer is option 4 i.e. 12.

Given:

LCM of two prime numbers x and y (x > y) = 253

Calculations:

HCF of two prime numbers is always 1

By using prime factorization we will get the two numbers

⇒ 253 = 23 × 11

Hence, the two numbers x and y are 23 and 11

Required difference = 23 - 11 = 12