2026 DSS P1 Q14

2026 DSS P1 Q14

Secondary 4
3 marks

\(\xi=\{\text{integers}\hspace{0.5em}x:1\leq x\leq24\}\).

This Venn diagram shows the elements of \(\xi\) and three sets \(A,B\) and \(C\).

  1. Describe the elements of set \(A\).[1]
  2. Fill in an appropriate set notation to complete the statement.
    \(12\ \boxed{\phantom{\notin}}\ B\)[1]
  3. Find the number of elements in \((A\cap B)\cup(A\cap B^{\prime})\).[1]

Solution:

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Answer:(a) Positive factors of 24. (b) \(\notin\). (c) 8.

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