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标题: 请教几道数学题 [打印本页]

作者: sayysong 时间: 2010-8-24 07:14 标题: 请教几道数学题

1. On the number line, the number p is twice as many units from -2 as -2 is from 6. If p is less than -2, what is the value of p?

A. -18 B. -10 C. -6 D. 10 D. 14 ANS: A

2. If x<y<z and y-x>5, where x is an even integer and y and z are odd integers, what is the least possible value of z-x?

A. 6 B. 7 C. 8 D. 9 E. 10 AND: D

不知道为什么。请高人指教

作者: taohuaxian 时间: 2010-8-24 21:21

两个都选择B?

作者: sayysong 时间: 2010-8-25 06:39

A. -18 和 D. 9

作者: taohuaxian 时间: 2010-8-25 21:01

1. p+2=2(2+6), p为负数，所以取-18
2. 代数进去，设x=2, y=9,则z 最小取11

作者: sayysong 时间: 2010-8-26 06:42

谢谢！！

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