GRE Exam Numerical Ability Geometry

A triangle has its vertices at A(0,1), B(5,2) and C(-7,-7). Which of the following statements is/are true?
A) AB>BC B) BC>AC C) Angle A > angle B D) Angle C > angle E) AB is the longest side

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GRE Other Question
The length and breadth of a cuboid are increased by 10% each while the height is decreased by 10%. Which of the following statements is/are true?
A. The volume of the cuboid increases
B. The volume of the cuboid decreases
C. The volume decreases by 9%
D. The volume increases by 8%
E. The volume increases by 8.9% 40% of a 2:3 solution of substance A and substance B is replaced with substance B. Which of the following is/are true?
A. The concentration of substance B increases
B. The concentration of substance A remains the same
C. The ratio of A to B becomes 1:3
D. The ratio of A to B becomes 5:11
E. The ratio of A to B becomes 6:19