Multiple choice

Which of the following is the highest common factor of 27 and 9?

  1. 3

  2. 6

  3. 9

  4. 18
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prime factorisation of 27 = 3 × 3 × 3 Prime factorisation of 9 = 3 × 3 HCF of 27 and 9 = 9

Keep practicing — related questions