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The surface area of a square tabletop was changed so that one of the dimensions was reduced by 1 inch and the other dimension was increased by 2 inches. What was the surface area before the changes were made? 1. After the changes were made, the surface area was 70 square inches. 2. There was a 25% increase in one of the dimensions. Data sufficiency

If the area of a triangular region RST is 25, what is the perimeter of RST? 1. The length of one side of RST is 5root2 2. RST is a right triangle isosceles triangle Data sufficiency question.

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Three types of pencils, J, K and L, cost $0.05, $0.10, and $0.25 each, respectively. If a box of 32 of these pencils costs a total of $3.40 and if there are twice as many K pencils as L pencils in the box, how many J pencils are in the box? A. 6 B. 12 C. 14 D. 18 E. 20

When the integer n is divided by 17, the quotient is x and the remainder is 5. When n is divided by 23, the quotient is y and the remainder is 14. Which of the following is true? A. 23x+17y=19 B. 17x-23y=9 C.17x+23y=19 D.14x+5y=6 E.5x-14y=-6

How many liters of pure alcohol must be added to a 100-liter solution that is 20% alcohol in order to produce a solution that is 25% alcohol? A. 7/2 B. 5 C. 20/3 D. 8 E. 39/4