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
7的倍数有：7,14,21,28,35,42,49,56,63,70,77,84,91,98
5的倍数和7的倍数有34个
就这些了,