作者doublechiu (...)
看板GRE
标题[计量] 问一题数学
时间Sat Jul 21 23:30:42 2012
Each of the following numbers has one digit blotted out. Which of the numbers
could be the sum of two consecutive odd integers?
Indicate all such sums
a.2,□24
b.3,□32
c.5,□54
d.6,□48
e.9,□62
答案是abd
我本来想说奇数相加尾数只可能是4或8
不过答案好像不是这样> <
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