89、Is X a factor of 10?
i. 4X is a factor of 100;
ii. X is an odd. ( Not precise, it is gimmick of ETS but you need be careful.)
【讨论】E
此提是不是考虑到 1 和 5 两中景况?
103、is M divisible by 12 ?
1)M/3 rem 1
2)M/4 rem 3
【确定】E
Q:There are 9 students, four of them got score of 82 or above, four of them got the score of 70 or blow. What is a possible value of their median. I.70 II.76 III.86
a.I only b.II only c.III only d.I &II e. I.II, III
51. 某食品成份是4 fat and 6 protein per service (老美的习惯,对食品都是以一客为单位标明成份) ,其中卡路里含量是9 per fat and 4 per protein. 问对每客而言,fat的卡路里含量比protein多多少。
【确认】4+根号15
此提如何理解?作者: twinhead 时间: 2002-9-20 15:02
89
1 4x is factor of 2^2*5^2 故4x=4或20或100 故x=1或5或25 1 & 5是10的因子;25不是,故不充分.
1 2结合x=1或5或25 亦不充分
故E