HCF & LCM

JKSSB Junior Assistant · Numerical Ability · 10 practice questions with answers and explanations: 0 Easy, 5 Medium, 5 Hard.

Sample questions

Sample Medium question 1

The product of two numbers is 2,160 and their HCF is 12. Find their LCM.

  1. 260
  2. 120
  3. 180
  4. 360
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Answer: C. HCF × LCM = product of the numbers, so LCM = 2,160 ÷ 12 = 180.

Sample Hard question 2

Find the HCF of the fractions 2/3, 4/9 and 8/27.

  1. 4/9
  2. 2/27
  3. 8/27
  4. 2/3
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Answer: B. HCF of fractions = HCF of numerators ÷ LCM of denominators = HCF(2, 4, 8) ÷ LCM(3, 9, 27) = 2/27.

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