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Home › GRE › GRE Quant - Number Properties (LCM and HCF)

GRE Quant - Number Properties (LCM and HCF) — GRE Questions & Practice

Practise 474 GRE Quant - Number Properties (LCM and HCF) questions from GRE 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 GRE Quant - Number Properties (LCM and HCF) — with answers

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

1. What is the Highest Common Factor (HCF) of 9 and 54?

  1. A12
  2. B2
  3. C6
  4. D9
Show answer

Answer: D

HCF(9, 54) = 9, the largest number that divides both 9 and 54 exactly.

2. What is the Highest Common Factor (HCF) of 4 and 62?

  1. A9
  2. B1
  3. C2
  4. D4
Show answer

Answer: C

HCF(4, 62) = 2, the largest number that divides both 4 and 62 exactly.

3. What is the Least Common Multiple (LCM) of 4 and 22?

  1. A37
  2. B47
  3. C42
  4. D44
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Answer: D

LCM(4, 22) = (4 x 22) / GCD(4, 22) = 88 / 2 = 44.

4. What is the Least Common Multiple (LCM) of 7 and 12?

  1. A84
  2. B83
  3. C89
  4. D81
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Answer: A

LCM(7, 12) = (7 x 12) / GCD(7, 12) = 84 / 1 = 84.

5. What is the Least Common Multiple (LCM) of 2 and 18?

  1. A13
  2. B18
  3. C25
  4. D17
Show answer

Answer: B

LCM(2, 18) = (2 x 18) / GCD(2, 18) = 36 / 2 = 18.

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