Multiple choice

Which of the following sets of numbers will have the highest common factor equal to 16?

  1. 48, 96, 145

  2. 24, 40, 64

  3. 50, 560, 140

  4. 48, 80, 112
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

48, 80, 112 Prime factorisation of 48 = 2 × 2 × 2 × 2 × 3 Prime factorisation of 80 = 2 × 2 × 2 × 2 × 5 Prime factorisation of 112 = 2 × 2 × 2 × 2 × 7 HCF = 2 × 2 × 2 × 2 = 16

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