[計量] GWD-21
GWD-21
Q2.
The sum of the first k positive integers is equal to k(k+1)/2. What is
the sum of the integers from n to m, inclusive, where 0 < n < m ?
(1) m(m+1)/2 - (n+1)(n+2)/2
(2) m(m+1)/2 - n(n+1)/2
(3) m(m+1)/2 - (n-1)n/2
(4) (m-1)m/2 - (n+1)(n+2)/2
(5) (m-1)n/2 - n(n+1)/2
Q7.
In the xy-plane, line a and line b have the same slope. If the y-intercept
of line a is -1, what is the y-intercept of line b?
(1) The x-intercept of line a is -1.
(2) Line b passes through the point (10,20).
Q10.
If d=1(2^3*5^7) is expressed as a terminating decimal, how many nonzero
digits will d have?
Q14.
The charge for a single room at Hotel P is 25 percent less than the charge
for a single room at Hotel R and 10 percent less than the charge for a
single room at Hotel G. The charge for a single room at Hotel R is what
percent greater than the charge for a single room at Hotel G?
Q21.
A store purchased a Brand C computer for the same amount that it paid for
a Brand D computer and then sold them both at higher prices. The store's
gross profit on the Brand C computer was what percent greater than its gross
profit on the Brand D computer?
(1) The price at which the store sold the Brand C computer was 15 percent
greater that the price at which the store sold the Brand D computer.
(2) The store's gross profit on the Brand D compiter was $300.
Q23.
On a certain transatlantic crossing, 20 percent of a ship's passengers held
round-trip tickets and also took their cars abroad the ship. If 60 percent
of the passengers with round-trip tickets did not take their cars abroad
the abroad the ship, what percent of the ship's passengers held round-trip
tickets?
Q24.
In the xy-plane, line n passes through the origin and has slope 4. If point
(1,c) and (d,2) are on line n, what is the value of c/d?
拜託大家了~謝謝:)
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