Use set notation to describe the shaded region in the Venn diagram.
- (a)Use set notation to describe the shaded region in the Venn diagram.[1]
- (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}
- (b)(i)Show this information on the Venn diagram below.[2]
- (b)(ii)Find n(A∩B).[1]
- (b)(iii)Find n(A∩(B∪C)').[1]
- (b)(iv)One subset in the Venn diagram in part (b)(i) has no elements. Use set notation to describe this subset.[1]
- (c)(i)Write 540 as the product of its prime factors.[2]
- (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]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- [1] (P∪Q)' or P'∩Q'
- [2] B1 for 8 or more correct
- [1] 4
- [1] FT their Venn diagram provided no repeated elements
- [1] 1
- [1] FT their Venn diagram provided no repeated elements
- [1] A'∩B∩C
- [2] 2² × 3³ × 5
- [2] M1 for at least two correct stages in factor tree or ladder method
- [2] 2 × 3² × 5
- [2] B1 for 90 seen or 2² × 3⁴ × 5²
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