GRE Exam Numerical Ability Area and Volume

A circular cap is enlarged to fit the lid of a jar. The new diameter is 50 per cent larger than the original. By what percentage has the area of the cap increased?

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GRE Other Question

Two sets of 4 consecutive positive integers have exactly one integer in common. The sum of the integers in the set with greater numbers is how much greater than the sum of the integers in the other set? If pqr = 1 , rst = 0 , and spr = 0, which of the following cannot be zero?
Indicate ALL such answers.
A. P
B. Q
C. R
D. S
E. T