Question : If A, B and C are three distinct prime numbers, then what is the highest common factor of A, B and C?
Option 1: 7
Option 2: 0
Option 3: 5
Option 4: 1
Correct Answer: 1
Solution :
The highest common factor (HCF) of any set of prime numbers is always 1.
This is because prime numbers are numbers that have only two distinct positive divisors i.e. 1 and the number itself.
Since A, B, and C are distinct prime numbers, they do not have any common factor instead of 1.
Hence, the correct answer is 1.
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