一共有30个数可以被5和7中的一个数整除。这些数分布在1-300之间,包括35,70,105,140,175,210,245,280。下面的数只能被5整除:5,10,15,20,25,30,40,45,50,55,60,65,75,80,85,90,95,100,110,115,120,125,130,135,145,150,155,160,165,170,180,185,190,195,200,205,215,220,225,230,235,240,250,255,260,265,270,275,285,290,295;下面的数只能被7整除:7,14,21,28,42,49,56,63,77,84,91,98,112,119,126,133,147,154,161,168,182,189,196,203,217,224,231,238,252,259,266,273,287,294。