Multiple choice

The numbers ending in which of the following digits can be prime numbers?

  1. 1, 3, 5, 7

  2. 1, 3, 5, 9

  3. 1, 3, 7, 9

  4. 1, 5, 7, 9

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The numbers ending in 1, 3, 7, 9 can be prime numbers.