将 1~16 填入下面八角形中的交点处,使每条直线上的数字之和都相等,已提示 3 个数字
这个应该是个小学题 很有挑战性1,每条(4个数的和)=34
\(每个数被用到2次,\frac{2*16*17}{2*8}=34\)
2,34=4+8+22=4+9+21
3,只有如下7种可能。
22=06+16:21=7+14=10+11
22=07+15:21=5+16=10+11
22=10+12:21=5+16=06+15=7+14 對的呀,不斷的排除,我也這樣想的 2022-01-25 13:20:20
(6, 16) (7, 14)
(6, 16) (10, 11)
(6, 16) (11, 10)
(6, 16) (14, 7)
(7, 15) (5, 16)
(7, 15) (10, 11)
(7, 15) (11, 10)
(7, 15) (16, 5)
(10, 12) (5, 16)
(10, 12) (6, 15)
(10, 12) (7, 14)
(10, 12) (14, 7)
(10, 12) (15, 6)
(10, 12) (16, 5)
(12, 10) (5, 16)
(12, 10) (6, 15)
(12, 10) (7, 14)
(12, 10) (14, 7)
(12, 10) (15, 6)
(12, 10) (16, 5)
(15, 7) (5, 16)
(15, 7) (10, 11)
(15, 7) (11, 10)
(15, 7) (16, 5)
(16, 6) (7, 14)
(16, 6) (10, 11)
(16, 6) (11, 10)
(16, 6) (14, 7)
用时 3.8202033042907715 秒
总共就三组答案.
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