3) DS:一个数列,平均数与和的比
(1)共有8个数
(2)和为100
答案:C
问题:A已足以求出了,对吗?
4) If K is common multiple of75, 98 ,140, which of the following must be true?
Ⅰ. K is a multiple of 9
Ⅱ. K is a multiple of 49
Ⅲ. K is greater than 14000
问题:很多人选II,但III应该也对呀,我算了.
5). A section of wire weighs XXX grams, cut them into two part with lengther of XXXcm, the mass is unformly distributed. What's the mass of 1 cm wire
问题:我的思路是设总 weighs 为X, lengther isYcm
the mass of 1 cm wire=1/(1+Y)*X, RIGHT?作者: yuwei 时间: 2002-12-25 10:17
1) 1+7^1....=S9=1-7^9/1-7 .....
2) this answer is right
3> u are RIGHT!
4> u are Right, III is 14700作者: redli 时间: 2002-12-25 10:24