Question

在1.2.3.5他们组成的两位数中，质数和合数各有哪些？奇数和偶数有哪些？2和3的公倍数是几？换没写完，进来

在1.2.3.5和他们组成的两位数中，质数和合数各有哪些？奇数和偶数有哪些？2和3的公倍数是几？3和5的公倍数是几？

Answer 1

答:
(1)质数:13,23,31,53
合数:12,15,21,25,32,35,51,52
(2)奇数:13,15,21,23,25,31,35,51,53
偶数:12,32,52
(3)2和3的公倍数:12,52
(4)3和5的公倍数:15

Answer 2

质数:13,23,31,53
合数:12,15,21,25,32,35,51,52
奇数:13,15,21,23,25,31,35,51,53
偶数:12,32,52
2和3的公倍数:12,52
3和5的公倍数:15
望采纳O(∩_∩)O~

Answer 3

(1)质数:13,23,31,53
合数:12,15,21,25,32,35,51,52
(2)奇数:13,15,21,23,25,31,35,51,53
偶数:12,32,52
(3)2和3的公倍数:12,52
(4)3和5的公倍数:15

Answer 4

质数:13,23,31,53
合数:12,15,21,25,32,35,51,52
奇数:13,15,21,23,25,31,35,51,53
偶数:12,32,52
2和3的公倍数:12,52
3和5的公倍数:15

Answer 5

质数13,31,51,23,53.合数12,21,15,32,25,52,35奇数21,13,31,15,51,23,25,35,53偶数12,32,52 ！！！！！！！！！