2025 DSS PRELIMS P1 Q14

2025 DSS PRELIMS P1 Q14

Secondary 4
3 marks
  1. \(\xi=\{\text{integers}\hspace{0.5em}x:1\leq x\leq14\}\), \(X=\{\text{perfect squares}\hspace{0.15em}\}\), and \(Y=\{\text{prime numbers}\hspace{0.15em}\}\).
    1. List the elements in \(Y'\).[1]
    2. Explain why \(X\cap Y=\varnothing\).[1]
  2. On the Venn diagram, shade the region which represents \((A'\cap B)'\).[1]

Solution:

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Answer:(a)(i) \(\{1,4,6,8,9,10,12,14\}\) (ii) \(\varnothing\) (b) \(A\cup B'\)

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