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  • 1 # 別吃兔子

    奇數:1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99;

    偶數:2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100;

    質數:2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97;

    合數:4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,50,51,52,54,55,56,57,58,60,62,63,64,65,66,68,69,70,72,74,75,76,77,78,80,81,82,84,85,86,87,88,90,91,92,93,94,95,96,98,99,100。

    偶數是能夠被2所整除的整數。正偶數也稱雙數。

    若某數是2的倍數,它就是偶數,可表示為2n;

    若非,它就是奇數,可表示為2n+1(n為整數),即奇數除以二的餘數是一。

    質數

    質數是可以被1和它自身整除的數。

    合數

    合數是除了1和它自身以外,還能被其它質數整除的數。

    非質非合數

    1和0既不是質數也不是合數。

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