2。both a and b are positive integers with three digits. the thousandth digit of a is 1 more than that of b, the tenth digit of a is 2 less than that of b, ask the difference between a/10－b/10?
答案：98
[此贴子已经被作者于2003-8-25 12:41:40编辑过]
作者: uclb5550 时间: 2003-8-25 14:24
Agree choice A.
The second question itself is not very clearly illustrated,is it? How about the hundredth and digit numbers? Are they all the same?作者: smart 时间: 2003-8-25 21:59
--------------------------------------------------------------------------------------
1。有5个正整数, 已知3,4,5,5一个未知, 问range是否大于2?
a average小于 median
b median=4
答案：a
---------------------------------------------------------------------------------------
denote x as the unkown integer,
1) when median=4, x = 1, 2, 3 range>2 or =2, so not correct.
2) average < median,
a) x=1,2, median=4, average < median, range > 2;
b) x=5,6,7, median = 5, average < median, range =2 or >2.
so answer should be E.作者: tony6 时间: 2003-10-10 09:34
