150 5和7的倍数有几个

问题描述:

150 5和7的倍数有几个

5的倍数有:5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100……150.一共30个.
7的倍数有:7,14,21,28,35,42,49,56,63,70,77,84,91,98,105,112,119……147.一共21个.
5和7的公倍数有:35,70,105,140.一共4个.