prep难题请教

lynalice1987 · 发表于 2010-6-30 08:49:10

Dear，那两个prep讨论帖搜索能用吗。。。？怎么都搜不到啊。。。

做ps1遇到的几道题，求NN帮助！！！

3.664-!-item-!-187;#058&000504

A certain taxi company charges $3.10 for the first [?] of a mile plus $0.40 for each additionalof a mile.What would this company charge for a taxi ride that was 8 miles long?

(A) $15.60(B) $16.00(C) $17.50(D) $18.70(E) $19.10

缺条件，所以没法做对吗？

116.11659-!-item-!-187;#058&007807
A certain junior class has 1,000 students and a certain senior class has 800 students.Among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 senior.If 1 student is to be selected at random from each class, what is the probability that the 2 students selected will be a sibling pair?

这题应该怎么算啊？(60/1000)*(1/800)对吗？

87.9993-!-item-!-187;#058&007019
In the addition table shown above, what is the value of m + n ?
(A) -19(B)4(C)5(D)6(E)22

这题完全没思路。。。那个图怎么看成加法？

93.10285-!-item-!-187;#058&007154
In the figure above, a square is inscribed in a circle.If the area of the square region is 16, what is the area of the circular region?

(A)2π(B)4π(C)6π(D)12π(E)16π

对角线4*根号2因此面积=8π啊???

canols · 发表于 2010-6-30 09:50:40

我模考的时候见过87题，这个题目的意思就是外面的row和column相加等于里面的数，比如4+x=1，4+z=m, e+y=n，你找找就可以解出m和n了

Dear，那两个prep讨论帖搜索能用吗。。。？怎么都搜不到啊。。。

做ps1遇到的几道题，求NN帮助！！！

3.664-!-item-!-187;#058&000504

A certain taxi company charges $3.10 for the first [?] of a mile plus $0.40 for each additionalof a mile.What would this company charge for a taxi ride that was 8 miles long?

(A) $15.60(B) $16.00(C) $17.50(D) $18.70(E) $19.10

缺条件，所以没法做对吗？

116.11659-!-item-!-187;#058&007807
A certain junior class has 1,000 students and a certain senior class has 800 students.Among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 senior.If 1 student is to be selected at random from each class, what is the probability that the 2 students selected will be a sibling pair?

这题应该怎么算啊？(60/1000)*(1/800)对吗？

87.9993-!-item-!-187;#058&007019
In the addition table shown above, what is the value of m + n ?
(A) -19(B)4(C)5(D)6(E)22

这题完全没思路。。。那个图怎么看成加法？

93.10285-!-item-!-187;#058&007154
In the figure above, a square is inscribed in a circle.If the area of the square region is 16, what is the area of the circular region?

(A)2π(B)4π(C)6π(D)12π(E)16π

对角线4*根号2因此面积=8π啊???

-- by 会员 lynalice1987 (2010/6/30 8:49:10)

lynalice1987 · 发表于 2010-6-30 21:22:09

谢谢Canols!但是我还是不知道该怎么做。。。根据图形4+z=m e+y=n 然后呢？。。。

其他题啊。。。我顶！！！大nn快来啊！！！我后天就考了....Please HELP!!!

mecsid · 发表于 2010-6-30 21:42:20

谢谢Canols!但是我还是不知道该怎么做。。。根据图形4+z=m e+y=n 然后呢？。。。

其他题啊。。。我顶！！！大nn快来啊！！！我后天就考了....Please HELP!!!

-- by 会员 lynalice1987 (2010/6/30 21:22:09)

87。 4＋x=1 4+y=-5 。。。。一步步来不是每个都算出来了么？

lynalice1987 · 发表于 2010-6-30 21:59:18

O~知道了~看来我还是不转弯。。。谢谢哈！！

lynalice1987 · 发表于 2010-6-30 21:59:34

其他题目啊~

加油顶！！！

tomtommer · 发表于 2010-7-4 16:47:59

请问有人知道上面的第93题怎么得到6pi的？我算来算去都是8pi.

prep难题请教

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