số có 3 chữ số khác nhau mà các chữ số đều chẵn là: 4*4*3=48 

số có 3 chữ số khác nhau mà các chữ số đều lẻ là : 5*4*3=60 

579 : 2 có dư vì phép chia hết cho 2 thì các số tận cùng phải là 0 ; 2  ; 4 ; 6 ; 8

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có ai biết cách giải ko?

2.3.4.3.4.5.5.2=\(2^2.3^2.4^2.5^2\)