Multiple choice

Which of the following sets of numbers will have 560b4a as LCM?

  1. 28b, 20ab3, 16b4

  2. 28b, 20ab2, 16b4

  3. 20b2, 28ab, 18b4

  4. 28b4, 18ab3, 16b
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

28b2, 20ab3, 16b4 Factors of 28b2 = 2 × 2 × 7 × b × b Factors of 20ab3 = 2 × 2 × 5 × a × b × b × b Factors of 16b4 = 2 x 2 x 2 x 2 x b x b x b x b LCM = 2 × 2 × 7 × 5 × 2 × 2 × b × b × a × b × b = 560ab4

Keep practicing — related questions