Question

Which pair of these numbers is coprime?

• A. 4, 12
• B. 33, 35
• C. 5, 9
• D. 45, 9

Answer 1

Answer:

B. 33, 35

The correct answer is option 2, Factors of 33: 1, 3, 11, 33, Factors of 35: 1, 5, 7, 35, No common factors except 1, so 33 and 35 are coprime.