Practice Quiz

SAT Math

Category - Number and Operations

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What is the union of A = {factors of 6} and B = {solutions of x^2 = 4}?
  1. {1,2,3,6}
  2. {-2,2,3}
  3. {1,2,3,4,6}
  4. {-2,1,2,3,6}
  5. {2}
Explanation
Answer: D - The union is {-2,1,2,3,6} . The union of two sets contains all elements from both sets.
A = {factors of 6} = {1,2,3,6}
B = {solutions of x^2 = 4} = {-2,2}
A∪B = {1,2,3,6}∪{-2,2} = {-2,1,2,3,6}
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