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If two numbers are 13 and 21, what is the product of their HCF and LCM?

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Question: If two numbers are 13 and 21, what is the product of their HCF and LCM?

  1. 274
  2. 273
  3. 272
  4. 275

Correct Answer: B — 273

Explanation: For two positive integers, HCF × LCM equals their product.
Using the values in this question gives 273 as the correct answer.

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