Multiple choice

Which of the following numbers are co-prime?

  1. 11, 13

  2. 11, 22

  3. 12, 44

  4. 66, 33

  5. 5, 15
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Co-primes are the numbers having only '1' as a common factor.  Their only common factor is 1.

Keep practicing — related questions