Multiple choice

Two friends were discussing their marks in an examination. While doing so, they realised that both the numbers had the same prime factors, although one got a score which had two more factors than the other. If their marks are represented by one of the option as given below, which option is correct?

  1. 30, 60

  2. 20, 80

  3. 40, 80

  4. 20, 60

  5. 10, 20
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Prime factors for 20 = 5 x 2 x 2 80 = 5 x 2 x 2 x 2 x 2 As the number 80 has two other prime factors 2, 2 other than common prime factors 5, 2, 2.

Keep practicing — related questions