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Which one of the following is a prime number?

Correct Answer: 373

Explanation:

√437 > 22

All prime numbers less than 22 are : 2, 3, 5, 7, 11, 13, 17, 19.


161 is divisible by 7, and 221 is divisible by 13.


373 is not divisible by any of the above prime numbers.


∴373 is prime.


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