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Home › SSC › LCM and HCF

LCM and HCF — SSC Questions & Practice

Practise 198 LCM and HCF questions from SSC for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on LCM and HCF — with answers

Try each question first, then open the answer. Explanations are included.

1. Find the LCM of 24 and 18.

  1. A63
  2. B102
  3. C73
  4. D72
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Answer: D

LCM = product / HCF = 24 x 18 / 6 = 72.

2. Find the LCM of 30 and 29.

  1. A870
  2. B871
  3. C850
  4. D865
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Answer: A

LCM = product / HCF = 30 x 29 / 1 = 870.

3. Find the LCM of 16 and 28.

  1. A113
  2. B112
  3. C105
  4. D125
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Answer: B

HCF of 16 and 28 = 4. LCM = (16 x 28)/HCF = 448/4 = 112.

4. Find the LCM of 4 and 19.

  1. A96
  2. B76
  3. C78
  4. D85
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Answer: B

HCF of 4 and 19 = 1. LCM = (4 x 19)/HCF = 76/1 = 76.

5. Find the LCM of 38 and 47.

  1. A1784
  2. B1806
  3. C1936
  4. D1786
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Answer: D

HCF of 38 and 47 = 1. LCM = (38 x 47)/HCF = 1786/1 = 1786.

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