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  • HCF (a, b) = 21 and LCM (a, b) = 56. If a = 3, then b = ?
Multiple choice

HCF (a, b) = 21 and LCM (a, b) = 56. If a = 3, then b = ?

  1. 294

  2. 26

  3. 74

  4. 392

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

HCF x LCM = ab 56 x 21 = 3b Or, b = 392

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