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O-LevelMathematicsNumber4024/21 · May/June 2018 · Q110 Marks

Use set notation to describe the shaded region in the Venn diagram.

  1. (a)Use set notation to describe the shaded region in the Venn diagram.[1]
  2. (b)E 8 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} A = {x: x is a factor of 12} B = {x : x is a multiple of 2} C = {x: x is a square number}
  3. (b)(i)Show this information on the Venn diagram below.[2]
  4. (b)(ii)Find n(A∩B).[1]
  5. (b)(iii)Find n(A∩(B∪C)').[1]
  6. (b)(iv)One subset in the Venn diagram in part (b)(i) has no elements. Use set notation to describe this subset.[1]
  7. (c)(i)Write 540 as the product of its prime factors.[2]
  8. (c)(ii)p is the smallest possible integer such that 540p is a square number. Find √540p, giving your answer as the product of its prime factors.[2]

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Mark scheme

Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.

  1. [1] (P∪Q)' or P'∩Q'
  2. [2] B1 for 8 or more correct
  3. [1] 4
  4. [1] FT their Venn diagram provided no repeated elements
  5. [1] 1
  6. [1] FT their Venn diagram provided no repeated elements
  7. [1] A'∩B∩C
  8. [2] 2² × 3³ × 5
  9. [2] M1 for at least two correct stages in factor tree or ladder method
  10. [2] 2 × 3² × 5
  11. [2] B1 for 90 seen or 2² × 3⁴ × 5²

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About this question

Topic
Number, O-Level Mathematics (syllabus 4024). Structured question, 10 marks.
Source
O-Level Mathematics, May/June 2018 Paper 2 Variant 1, question 1.

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