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Q: If A₁ and A₂ are two distinct prime numbers, then what is the highest common factor of A₁ and A₂?
  • A. 2
  • B. 1
  • C. 5
  • D. 3
Correct Answer: Option B - HCF of two distinct prime numbers will have only one common factor and that would be 1. Hence, their HCF will be 1.
B. HCF of two distinct prime numbers will have only one common factor and that would be 1. Hence, their HCF will be 1.

Explanations:

HCF of two distinct prime numbers will have only one common factor and that would be 1. Hence, their HCF will be 1.