Which of the following numbers are prime?(a) 23 (b) 51 (c) 37 (d) 26

Given :

The given numbers are 23, 51, 37, and 26.

To do :

We have to find which of the given numbers are prime.

Solution :

(a) 23

Factors of 23 - 1, 23.

23 has exactly two factors. So, 23 is a prime number.

(b) 21

Factors of 51 - 1, 3, 17, 51.

51 has more than two factors. So, 51 is not a prime number.

(c) 37

Factors of 37 - 1, 37.

37 has exactly two factors. So, 37 is a prime number.

(d) 26

Factors of 26 - 1, 2, 13, 26.

26 has more than two factors. So, 26 is not a prime number.

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Updated on: 10-Oct-2022

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