JAMB Mathematics 2012 Question 9

Question 9

Sets

If P is a set of all prime factors of 30 and Q is a set of all factors of 18 less than 10, find P∩Q.

  1. A.{3}
  2. B.{2,3}
  3. C.{2,3,5}
  4. D.{1,2}
Show the answer and explanation

Answer: B ({2,3})

Explanation

P = {2, 3, 5} and Q = {1, 2, 3, 6, 9}. The common elements are 2 and 3.