GRE Exam Numerical Ability Area and Volume

Three solid cubes of lead, each with edges 10 centimeters long, are melted together in a level, rectangular-shaped pan. The base of the pan has inside dimensions of 20 centimeters by 30 centimeters, and the pan is 15 centimeters deep. If the volume of the solid lead is approximately the same as the volume of the molted lead, approximately how many centimeters
deep is the melted lead in the pan?

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GRE Other Question
One integer will be randomly selected from the integers 11 to 60, inclusive. What is the probability that the selected integer will be a perfect square or a perfect cube?
(A) 0.1 (B) 0.125 (C) 0.16 (D) 0.5 (E) 0.9 If a, b, c, and d are consecutive integers such that a