Practice Quiz

SAT Math Practice Exam

Category - Mathematics - Hard

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If Set A is a set of first 5 odd numbers and Set B is a set of first 5 prime numbers. Find Set AΩB.
  1. {1,3,5,7,9}
  2. {1,3,5,7,9,11}
  3. {2,9,11}
  4. {3,5,7}
Explanation
Answer D: AΩB is the intersection of sets A and B and is defined as the set that have all the elements which are common in both sets. Set A (1,3,5,7,9) B= (2,3,5,7,11) Numbers 3, 5 and 7 are common.

Key takeaway: Set theory is important for GMAT. Simple questions based on the understanding of basic rules of set theory are asked. Learn these rules.
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