WAEC Mathematics 2013 Objective — Question 37
Question 37 of 50 from the West African Examinations Council (WAEC) Mathematics 2013 Objective paper, with the correct answer and a full explanation.
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If P={prime factors of 210} and Q={prime numbers less than 10}, find P∩Q.
- A. {1,2,3}
- B. {2,3,5}
- C. {1,3,5,7}
- D. {2,3,5,7}Correct
Explanation
210 = 2×3×5×7, so P={2,3,5,7}. Q={2,3,5,7} (primes less than 10). P∩Q = {2,3,5,7}.
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