2026 TPSS P1 Q19

2026 TPSS P1 Q19

Secondary 4
2 marks

\(\xi=\{\text{integers}\hspace{0.5em}x:1<x\leq17\}\)

\(X=\{x:3\leq x<15\}\)

\(Y=\{\text{factors of}\hspace{0.5em}20\}\)

  1. List the elements in \(X\cap Y\).[1]
  2. Find \(\mathrm{n}(X\cup Y)\,{}^{\prime}\).[1]

Solution:

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Answer:(a) \(\{4,5,10\}\) (b) \(3\)

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