Post-UTME Mathematics 2019 Objective — Question 28
Question 28 of 50 from the Post-UTME Screening (Post-UTME) Mathematics 2019 Objective paper, with the correct answer and a full explanation.
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If x = (all prime factors of 44) and y = (all prime factors of 60), the elements of X ∪ Y and X ∩ Y respectively are
- A. (2,4,3,5,11) and (4)
- B. (4,3,5,11) and (3,4)
- C. (2,5,11) and (2)
- D. (2,3,5,11) and (2)Correct
Explanation
Prime factors of 44: 2,11; of 60: 2,3,5; X∪Y = {2,3,5,11}, X∩Y = {2}.
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