GRE GMAT TESTs AND SOLUTIONs

If the ratio of two numbers is 6 and their sum is 21, what is the value of the larger number? (A) 1 (B) 5 (C) 12 (D) 17 (E) 18

What percent of 3x is 6y if x = 4y? (A) 50% (B) 40% (C) 30% (D) 20% (E) 18%

In the figure above, triangle ABC is isosceles with base AC. If x = 60°, then AC = (A) 2 (B) 3 (C) 4 (D) 14/3 (E) Sqr 30