Number System

JKSSB Class-IV & MTS · Mathematics · 97 practice questions with answers and explanations: 35 Easy, 34 Medium, 28 Hard.

Sample questions

Sample Easy question 1

Find the LCM of 15 and 20.

  1. 40
  2. 50
  3. 60
  4. 70
Show answer

Answer: C. The least common multiple of 15 and 20 is 60.

Sample Medium question 2

Find the unit digit of 8³⁷.

  1. 2
  2. 4
  3. 6
  4. 8
Show answer

Answer: D. Unit digits of powers of 8 cycle as 8,4,2,6 (period 4); 37 mod 4 = 1, giving unit digit 8.

Sample Hard question 3

The product of two numbers is 2016 and their HCF is 12. Find their LCM.

  1. 162
  2. 165
  3. 168
  4. 171
Show answer

Answer: C. LCM = product/HCF = 2016/12 = 168.

More Mathematics topics for JKSSB Class-IV & MTS

Related articles