[計量] 好多題計量請教
1. If M is 30% of Q, which in turn is 20% of P, and N is 50% of P, then the
ratio of M to N is
(A) 3/250
(B) 3/25
(C) 1
(D) 6/5
(E) 4/3 ANS:(B)
2. 1 < a < b < 2
Column A Column B
ab a+b ANS:B
3. If a, b, and c are the number selected from the set of {1,2,3,4,5}
with replacement, what is the probability that the value of ab+c will be
even?
(A) 2/5
(B) 59/125
(C) 7/25
(D) 64/125
(E) 3/5 ANS:(B)
4. An obtuse triangle has sides of lebgths of 11, 15, and k, where k is an
integer.
Column A Column B
The number of 13
values of k. ANS:C
5. If f(x) = x^(x+1)*(x+2)^(x+3), then f(0)+f(-1)+f(-2)+f(-3) is
(A) -8/9
(B) 0
(C) 8/9
(D) 1
(E) 10/9 ANS:(E)
6. For function f(n){n+3, n is odd , where n is a positive intege. If k is an
n/2, n is even
odd number, and f(f(f(k)))=27, then what is the sum of digits of k?
(A) 3
(B) 6
(C) 9
(D) 12
(E) 15 ANS:(B)
7. If E(n) represents the sum of even digits of n, for example, E(5681)=6+8=14
then E(1)+E(2)+E(3)+...+E(100) is
(A) 200
(B) 360
(C) 400
(D) 900
(E) 2250 ANS:(C)
8. A fair die of six faces is tossed three times repeatedly. If the sum of the
number of dots from the first two times is equal to the number of dots from
the third time, then what the probability that at least one of the three
successive tosses will get 2 dots?
(A) 1/6
(B) 91/210
(C) 1/2
(D) 8/15
(E) 7/12 ANS:(B)
9. Two marbles are drawn without replacement from a jar that contains 1,001
red marbles and 1,001 green marbles. If Ps represents the probability that
the two drawn marbles are in the same color, and Pd represents the
probability that the two drawn marbles are in different colors, what is
the value of |Ps - Pd|?
(A) 0
(B) 1/2002
(C) 1/2001
(D) 2/2001
(E) 1/1000 ANS:(C)
10. If a is greater than c by 50%, and b is greater than c by 25%, then a is
greater than b by what percent?
(A) 20
(B) 25
(C) 50
(D) 100
(E) 200
今天是小年夜，考完的就好享受過年的氣氛
還在準備的過年也可以稍微放鬆休息一下，希望大家都能有好成績！
祝GRE板上許多認真念書的板友們新年快樂！考試順利！
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