Question

Please help with this math question i got a lil confused.

Which of these is a prime number?
Group of answer choices

a. 152

b. 133

c. 156

d. 149

Answer 1

149 because it doesn’t have more than two factors

Answer 2

149

Explanation:

The give numbers can be written as :

152 = 2 * 76 OR 1 * 152 OR 38 * 4

133 = 1 * 133 OR 7 * 19

156 = 2 * 78 OR 1 * 156 OR 3 * 52

149 = 1 * 149

So 149 is a prime number as it gave only 1 and the number itself as factors.

Other numbers have more than 2 factors.

Hope it helps