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能被2整除的數位就是偶數,末位必須是偶數4,或6,或8 1,3,4,6,8組成的數位中偶數有: 個位數:3個 十位數:3*4=12個 百位數:3*(4*3)=36個 千位數:3*(4*3*2)=72個 萬位數:3*(4*3*2*1)=72個 總共有3+12+36+72+72=195個 答:可以組成195個能被2整除的的數位
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