Multiple choice

What is the highest common factor of 39 and 65?

  1. 9

  2. 12

  3. 13

  4. 16
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prime factorisation of 39 = 3 × 13 Prime factorisation of 65 = 5 × 13 HCF of 39 and 65 = 13

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