Multiple choice general knowledge math & puzzles

A = {1,2,3,4}, B = {2,4,6,8}, C = {3,4,5,6} Find: (A U B) n C

  1. {1,3,6,8}

  2. {3,4,6}

  3. {2,4,6,8}

  4. {1,5,6,8}
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B Correct answer
Explanation

First find A U B = {1,2,3,4,6,8}, then intersect with C = {3,4,5,6}. The common elements are 3, 4, and 6, so (A U B) n C = {3,4,6}. Remember: union first (combine all), then intersection (keep only what's in both).

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