The ratio of two numbers is 6 ∶ 7 and their HCF is 3. Their LCM is          .

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SSC CGL 2022 Tier-I Official Paper (Held On : 13 Dec 2022 Shift 4)
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  1. 124
  2. 128
  3. 122
  4. 126

Answer (Detailed Solution Below)

Option 4 : 126
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Detailed Solution

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Given:

The ratio of two numbers is 6 ∶ 7 and their HCF is 3. 

Concept used:

LCM is the smallest common multiple of two or more numbers.

Calculation:

First number = 6 × 3 = 18

Second number = 7 × 3 = 21

LCM (18, 21) = 3 × 6 × 7 = 126

∴ Their LCM is 126.

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