Multiple choice

Which of the following pairs of number will have 672 as LCM?

  1. 84 and 32

  2. 89 and 35

  3. 84 and 36

  4. 94 and 32
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A Correct answer
Explanation

Prime factorisation of 84 = 2 × 2 × 3 × 7 Prime factorisation of 32 = 2 × 2 × 2 × 2 × 2 LCM = 2 × 2 × 3 × 7 × 2 × 2 × 2 = 672

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