Practice Quiz

SAT Math

Category - Number and Operations

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Which of the following is the element of the set A = {x∈S and 2x/(x + 1)∈S}, where S = {0,1,2,3,4,5,6}?
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
Explanation
Answer: A - The element of A is 1.
x = 1∈S and (2×1)/(1 + 1) = 2/2 = 1∈S
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