SAT Math Question of the Day

Q: If Set X = {1,2,5,7} and Set Y = {1,3,5,6,7,9}, then what is the intersection of Set X and Set Y?

1. {1,3,6}
2. {1,5,7}
3. {3,6,9}
4. {2}
5. {5,7}

UNANSWERED.

The correct answer is B.

A: {1,5,7} is the correct answer. To find the intersection of 2 sets, you look for what elements are in both sets. Since 1, 5 and 7 are the only elements that are in both Set X and Set Y, that is the intersection.