Nova Press: Set A - Intro to Data Sufficiency

Question Name	Average time to answer (seconds)	Total correct answers	Total incorrect answers
21. How many minutes are there in time period T?( Time period T extends ... ...	42	7	14
22. If x ≠ −1 and y ≠ ±1, then what is the value of ?( x = ( y ... ...	72	18	3
Note, the value of y is not needed to determine the value of the expression ... ...	103	4	17
24. The set S of numbers has the following properties: I) If x is in ... ...	88	4	17
25. In ΔPQR above, what is the value of y?( x = 60( y + z = 150Consider ... ...	139	16	10