Multiple choice

Which of the following sets of numbers will have 80y2x as LCM?

  1. 4y2, 16x, 8y

  2. 2y2, 16xy, 8a

  3. 8y2, 16xy, 10y

  4. 18y2, 16xy, 4y
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

8y2, 16xy, 10y Factors of 8y2 = 2 × 2 × 2 × y × y Factors of 10y = 2 x 5 x y Factors of 16 × y = 2 × 2 × 2 × 2 × x × y LCM = 2 × 2 × 2 × 2 × 5 x x × y = 80xy2

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