# Which of the following numbers are prime?

(a) 23 (b) 51 (c) 37 (d) 26

**Solution:**

We will be using the concepts of Prime Number to solve this.

(a) 23 is a prime number [23 can be expressed as 23 = 1 x 23]

(b) 51 is not a prime number [51 can be expressed as 51 = 1 x 3 x 17]

(c) 37 is a prime number [37 can be expressed as 37 = 1 x 37]

(d) 26 is not a prime number [26 can be expressed as 26 = 1 x 2 x 13]

NCERT Solutions Class 6 Maths - Chapter 2 Exercise 3.2 Question 8

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

**Summary:**

The numbers 23 and 37 are prime while 26 is not