Question

1到12中任意五个数相加等于30的组合有哪些不能重复

Answer 1

(1)1,2,4,11,12

(2)1,2,5,10,12

(3)1,2,6,9,12

(4)1,2,7,8,12

(5)1,3,4,10,12

(6)1,3,5,9,12

(7)1,3,5,10,11

(8)1,4,5,8,12

(9)1,4,5,9,11

(10)1,5,6,7,11

(11)1,5,6,8,10

(12)2,3,4,9,12

(13)2,3,4,10,11

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照这个规律推下去就行了,很多了