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奇数:79,13,57,97,51,1,35,91,121,
偶数:502,82,70,312,90,20,
质数:79,13,97,
合数:502,57,51,35,82,70,91,121,312,90,20,
自然数:79,502,13,57,97,51,1,35,82,70,91,121,312,90,20,
5的倍数:35,70,90,20,
3的倍数:57,51,312,90
2,3,5的倍数:90
偶数:502,82,70,312,90,20,
质数:79,13,97,
合数:502,57,51,35,82,70,91,121,312,90,20,
自然数:79,502,13,57,97,51,1,35,82,70,91,121,312,90,20,
5的倍数:35,70,90,20,
3的倍数:57,51,312,90
2,3,5的倍数:90
追答
1+2+3+……+99+100+101
=(1+101)+(2+100)+(3+99)+……+(50+52)+51
=102+102+102+……+102+51
=50×102+51
=5100+51
=5151是奇数
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