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1. circle C and line k lie in the xy-plane. if circle C is centered at the origin and has radius 1, does line k intersect circle C?
1) the x-intercept of line k is greater than 1
2) the slope of lie k is -1/10
the answer is E.
2. is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?
1) two of the interior angles of ABCD are right angles
2) the degree measure of angle ABC is twice the deree measure of angle BCD.
the answer is E, why it is not C?
3. set A,B,C have soem elements in common. if 16 elements are in both A and B, 17 elements are in both A and C, and 18 elements are in both B and C, how many elements do all three of the sets A, B, and C have in common?
1) of the 16 elements that are in both A and B, 9 elements are also in C
2) A has 25 elements, B has 30 elements, and C has 35 elements.
the answer is A. why?
4。at a certain store, each notepad costs x dollars and each marker costs y dollars. if $10 is engough to buy 5 notepads and 3 markers, is $10 enough to buy 4 notepads and 4 markers instead?
1) each notepad costs less than $1
2) $10 is enough to buy 11 notepads.
the answer is E.
另外还有一个问题，就是对于DATA SUFFICIENCY，如果所给的条件可以算出答案，但是是否定的答案，（如果说，问题问是否可以什么什么，但是根据所给的条件，得出来是不可以）那是应该选不SUFFICIENT 还是选可以啊？
5.a manufacture produced x percent more video cameras in 1994 than in 1993 and y percent more video cameras in 1995 than in 1994. if the manufacturer produced 1,000 video cameras in 1993, how many video cameras did the manufacturer produce in 1995?
1) xy=20
2)x+y+ xy/100 = 9.2
why the answer is B, but not C?
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发表于 2006-2-20 07:27:00
