160, Answer 31

來源: 於 2010-07-16 13:10:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

160 17, 23, 24, 26, 30, 27, 32, ?

17 + 7-1 = 23
23 + 3-2 = 24
24 + 4-2 = 26
26 + 6-2 = 30
30 + 0-3 = 27
27 + 7-2 = 32
32 + 2-3 = 31