单项选择题

If y is the average(arithmetic mean)of n consecutive positive integers，n＞1，what is the sum of the greatest and least of the seintegers（）

A.A
B.B
C.C
D.D
E.E

<上一题目录下一题>

热门试题

单项选择题

If x，Y and z are consecutive integers and x＜y＜z，which of the following must be true（） Ⅰxyz is even． Ⅱx+y+z is even． Ⅲ (x+y)(y+z)is odd．

A. None
B. Ⅰonly
C. Ⅱ only
D. Ⅰ and Ⅲ only
E. Ⅰ，Ⅱ，and Ⅲ

单项选择题

The figure above consists of 2 5 squares．If the figure were folded along the dotted diagonal to form a flat triangle，then 26minus the number in the square that would coincide with the square containing 26 would be（）

A. 13
B. 14
C. 15
D. 16
E. 17

相关试题