问GWD三道数学题

viovio1989

Q10
    The sides of a square region, measured to the
        nearest centimeter, are 6 centimeters long. The
        least possible value of the actual area of the
        square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
Q13
If the average (arithmetic mean) of the assessed values
of x houses is $212,000 and the average of the assessed
values of y other houses is $194,000, what is the average
of the assessed values of the x+y houses?

(1) x+y=36
(2) x=2y

    A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Q23.
At a fruit stand yesterday, the price of each apple was $0.10 more than the price of each orange. What was the total revenue from the sale of oranges at the fruit stand yesterday?
(1) The number of oranges sold at the fruit stand
  yesterday was 5 more than the number of
  apples.
(2) The total revenue from the sale of apples
  at the fruit stand yesterday was $15.00
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
l Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient
l BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
l EACH statement ALONE is sufficient
l Statements (1) and (2) TOGETHER are NOT sufficient