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If a, b are two distinct prime number than a highest common factor of a, b is ___________

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If a, b are two distinct prime number than a highest common factor of a, b is ___________

(a) 2

(b) 0

(c) 1

(d) ab

The question was asked during an online interview.

Question is from Number Theory in chapter Number Theory and Cryptography of Discrete Mathematics

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Best answer
The correct answer is (c) 1

The explanation: HCF of two prime numbers is 1.

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