[計量] 小弟求幾題數學題感謝各位
GWD 18-Q4
If x and y are integers, what is the value of 2x^6y - 4 ?
(1) x^2y = 16
(2) x^y = 4
ANS: A
GWD 18-Q6
The function f is defined for each positive three-digit integer n by
f(n) = 2x 3y 5z, where x, y and z are the hundreds, tens, and units digits
of n, respectively. If m and v are three-digit positive integers such that
f(m) = 9 f(v), then m - v =
A. 8
B. 9
C. 18
D. 20
E. 80
ANS: D
GWD 18-Q9
Is x < 0 ?
(1) x^3 < x^2
(2) x^3 < x^4
ANS: C
GWD 18-Q29
A sum of money was divided between John and Anne such that
the ratio of John's share to Anne's share was 5 to 3.
If John's share exceeded of the sum of money by $50,
(這句看不太懂)
what was Anne's share?
A. $180
B. $270
C. $340
D. $450
E. $720
ANS: B
GWD 18-Q32
What is the probability that event E or event F or both will occur?
(1) The probability that event E will occur is 0.6.
(2) The probability that event F will occur is 0.4.
ANS: E
GWD 18-Q36
If x and y are integers, is y an even integer?
(1) 2y - x = x^2 - y^2
(2) x is an odd integer.
ANS: A
抱歉各位大大!小弟因為沒補習一直埋頭苦幹可是還是有很多不會
所以只能靠版上的各位大大相助。 感謝再感謝
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