哪個數既是兩个一數，又是5个一數?
回答 (1)
2015-09-27 11:04 am
2,4,6,8,10,12,14,16,18,20,-----
5,10,15,20,---
所以10,20,30,--- (10個一數)
5,10,15,20,---
所以10,20,30,--- (10個一數)
收錄日期: 2021-05-03 14:53:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150927011528AARRjw5