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
我本來想說奇數相加尾數只可能是4或8
不過答案好像不是這樣> <
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※ 編輯: doublechiu 來自: 140.112.155.119 (07/21 23:32)