[問題]考古題 DS FROM14 SEC 3-Q23

[amyliang]

考古題 DS FROM14 SEC 3-Q23
Is the sum of all the terms in a sequence of positive integers an odd integer?
(1) the sequence is composed of consecutive integers
(2) There are 50 terms in the sequence.

我的答案是(E)
如果我的題目沒有看錯的話，我是設2.4.6.810
這樣合起來的數字都不是odd
可是它的答案是C　
麻煩高手指教　謝謝
Amy Liang

[阿正]

(1) 是指連續的正整數 + (2)50項
如 2,3,4..........51
加起來當然為ODD 因為不論如何ODD只有25個