标题: og12的两道书序题~请赐教~~~~~ [打印本页] 作者: 小娟子nana 时间: 2010-3-6 14:21 标题: og12的两道书序题~请赐教~~~~~ og12——98 Seven different numbers are selected from the integers 1 to 100, and each number is divided by 7. What is the sum of the remainders?
(1) The range of the seven remainders is 6. (2) The seven numbers selected are consecutive integers.
答案是b。有谁会解答这题吗？看了og后面的解释，也不太明白阿。题目中，既然挑选出来的7个数，每个数都可以被7整除，为什么还要求余数呢？明明是“is divided by 7”了。另外（1）是什么意思阿，看不明白。请赐教~谢谢
og12-99
r
s
t
u
v
w
x
y
z
Each of the letters in the table above represents one of the numbers 1, 2, or 3, and each of these numbers occurs exactly once in each row and exactly once in each column. What is the value of r ? (1) v + z = 6(2)s + t + u + x = 6
og12——98