JAMB Mathematics questions: Sets

24 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Sets· JAMB

   If A = {x : x is a prime number less than 10}, find n(A).

   • A9
   • B5
   • C3
   • D4

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   Explanation and discussion

2. Question 22· Sets· JAMB

   U = {1, 2, 3, …, 10} and A is the set of even numbers in U. Find n(A′).

   • A6
   • B4
   • C5
   • D10

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   Explanation and discussion

3. Question 23· Sets· JAMB

   If P = {x : 2 < x ≤ 9, x is a prime number}, list the elements of P.

   • A{3, 5, 7}
   • B{2, 3, 5, 7}
   • C{3, 5, 7, 9}
   • D{5, 7}

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   Explanation and discussion

4. Question 24· Sets· JAMB

   If A = {1, 2, 3, 4} and B = {3, 4, 5}, find A ∩ B′ (the elements of A that are not in B).

   • A{5}
   • B{1, 2}
   • C{3, 4}
   • D{1, 2, 5}

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   Explanation and discussion