1至300中的 质数答:1至300中的质数共有63个。2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,133,137,143,149,151,157,161,163,167,169,173,179,181,183,187,191,193,197,203,209,211,223,227,229,233,241,251,253,257,263,...
1到22之间任意5个数相加等于52的组合有多少(数和数不要重复的)最好把...答:(27) 1, 3, 7,19,22 (28) 1, 3, 7,20,21 (29) 1, 3, 8,18,22 (30) 1, 3, 8,19,21 (31) 1, 3, 9,17,22 (32) 1, 3, 9,18,21 (33) 1, 3, 9,19,20 (34) 1, 3,10,16,22 (35) 1, 3,10,17,21 (36) 1, 3,10,18,20 (37) 1, 3,11,15,22 ...