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各位大侠，本人数学狂不好，经常绕不过弯，请大家多指教，谢谢各位了。
123. At 9 am, a hiker was due south of point P, What direction was point P from position at noon?
(1) From 9 am, until 11 am she walked due east at 2 miles per hours and from 11 am until noon, she walked due north at 3 miles per hour
(2) At noon, she is exactly 4.5 miles from point P.
答案居然是E， 为什么 A 不行呢？ 从9点到11点，向东走了2*2=4 miles， 从11点到noon（12点），向北走了3*1=3 miles, 这样不就能求出其距离为5 miles 吗？
127. If the number of square units in the area of a circle is A and the number of linear units in the circumference is C, what is the radius of the circle?
(1) A / C = 3 / 2
(2) A>C+3
答案是A，请问units是什么意思，这个题目又是什么意思呢，我翻译这个题目感觉怪怪的，不明其意
132. Two children, Bob and Marry, have piggy banks into which they deposit money earned from doing odd jobs. In a certain year, both Bob and Marry each deposited $ 5 on the first of every month into their respective piggy banks. If these were the only deposits made into the piggy banks during the year, on December 31 does Bob have more money in his piggy bank than Mary has in her piggy bank? ( Assume no withdrawals)
(1) On March 15 Bob had three times as much money in his piggy bank as Mary had in hers.
(2) On June 15 Bob had twice as much money in his piggy bank as Mary had in hers.
答案是D，请问piggy banks 是什么意思啊？ 这题该如何理解呢？
155. A shipment of banners contains banners of two different shapes, triangular and square, and two different colors, red and green. In a particular shipment 26% of the banners are square and 35% of the banners are red. If 60% of the red banners in the shipment are square, what is the ratio of red triangular banners to green triangular banners?
答案是 7 / 30， 我遇见百分比的题头就大了，请大家能给我好好的讲讲行吗？
177. All of the following have the same number of distinct prime factors EXECPT
(A) 20 (B) 21 (C) 24 (D) 30 (E) 45 答案是D，我觉得是不是答案给错了？
20=2*2*5 21=3*7 24= 2*2*2*3 30=2*3*5 45=3*3*5 答案B， 不是也没有相同的数字吗？
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发表于 2004-4-20 18:01:00
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