GRE® Set Theory Questionbank

Free GRE Quant Practice Questions | GRE Sample Questions Questionbank

The concepts tested include union and intersection of 2 or 3 sets, subsets, proper subsets, and complementary sets. Sample GRE practice questions from set theory is given below. Attempt these questions and check whether you have got the correct answer. If you have not go to the explanatory answer or the video explanations (wherever provided) to learn how to crack the question.


  1. Set A comprises all 3-digit numbers that are multiples of 6. Set B comprises all 3-digit numbers that are multiples of 4 but are not multiples of 8. How many elements does (A ∪ B) comprise?

    1. 224
    2. 225
    3. 263
    4. 265
    5. 300
    Choice B
    225
    Approach to solve this GRE Set Theory question

    Step 1: Let Set A comprise all 3-digit numbers that are multiples of 6.
    Step 2: Let Set B comprise all 3-digit numbers that are odd multiples of 4.
    Step 3: Find Set A ∪ B to find the answer to the question.


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