GRE GMAT TESTs AND SOLUTIONs

 X and Y are positive numbers.    Quantity A                                                   Quantity B Sqr (X)-Sqr (Y)                                      Sqr(  X-2*(Sqr(X*Y))+Y)

Quantity A                                                    Quantity B 35,043 × 25,430                                     35,430 × 25,043 A)The quantity in Quantity A is greater. B)The quantity in Quantity B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.

                           y<>0 5Y^2                                           -Y^2/7 A)The quantity in Quantity A is greater. B)The quantity in Quantity B is greater. C)The two quantities are equal. D)The relationship cannot be determined from the information given.

To fill a larger concert hall, a madrigal singing group consisting of sopranos, altos, and basses, in a 5:7:3 ratio, needs 40 singers. What is the least number of basses the group will need?