the number four(4) is it prime ?, yes, no, the number one(1) is it prime ?, yes, no, the number six(6) is it composite ?, yes, no, the number five(5) is it composite ?, yes, no, the number seven(7) is it prime ?, yes, no

prime and composite

排行榜

视觉风格

选项

切换模板

恢复自动保存: