This is aptitude questions and answers section on Problems on LCM and HCF with explanation for various interview, competitive examinations and entrance tests.

1.
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LCM of 18 and 27 is:

2. LCM of 87 and 145 is:
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3. LCM of 455, 117, 338 is:
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4. LCM of 1/3, 5/6, 5/4, 10/7 is:
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Answer: Option B

Explanation:

LCM of numerators = 10

HCF of denominators = 1

=> 10/1 = 10

5. HCF of 3/16, 5/12, 7/8 is:
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Answer: Option C

Explanation:

HCF of numerators = 1

LCM of denominators = 48

=> 1/48