作者chilis (庞克新生报到^_^)
看板GMAT
标题[计量] GWD1-9.18.21.27.30
时间Tue Sep 2 20:12:48 2008
Q12:
If n is an integer and 2 < n < 6, what is the value of n?
(1) n is a factor of 15.
(2) n is a factor of 21.
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Answer: B
Q18:它的图我没办法贴@@
The figure shows a square patio surrounded by a walkway of width x meters.
If the area of the walkway is 132 square meters and the width of the patio
is 5 meters greater than the width of the walkway, what is the area of the
patio, in square meters?
A. 56
B. 64
C. 68
D. 81
E. 100
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Answer: B patio-天井;露台
Q21:
When Leo imported a certain item, he made a 7 percent import tax on the
portion of the total value of the item in excess of $1,000.
If the amount of the import tax that Leo paid was $87.50, what was the total
value of the item?
A. $1,600
B. $1,850
C. $2,250
D. $2,400
E. $2,750
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Answer: C
Q27:
If n = 8^11 – 8, what is the units digit of n?
A. 0
B. 1
C. 4
D. 6
E. 8
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Answer: C
8^1=8
8^2=64
8^3=512
8^4=4096
8^5=32768
8^6=262144
由上可知次方1~4唯一4循环,所以11÷4=…..3
所以811余2再减8, n = 811 – 8所得余6选(D) 算的跟题目答案不同
欢迎大家一起讨论^^..感谢~
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◆ From: 59.104.60.103
※ 编辑: chilis 来自: 59.104.60.103 (09/02 20:14)
1F：→ flac:Q12. (1)n为3,5-->不满足 (2)n为3--->满足 所以为B 09/02 20:18
2F：→ flac:Q21. 超过1000元要征收0.07的税 故(87.5/0.07)+不课税的1000 09/02 20:20
3F：推 flac:Q27 如你所述 4循环 余3 所以8^11个位数是2 扣掉8 个位数为4 09/02 20:26