Multiple choice

Which of the following sets of the numbers will have the highest common factor equal to 18?

  1. 38, 58, 124

  2. 36, 54, 126

  3. 28, 54, 126

  4. 36, 54, 128
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

36, 54, 126 Factors of 36 = 2 × 2 × 3 × 3 Factors of 54 = 2 × 3 × 3 × 3 Factors of 126 = 2 × 3 × 3 × 7 HCF = 2 × 3 × 3 = 18

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