用1-4四个数可以组成多少没有重复的这数字的三位数,如果可以重复使用最...答:24个 不重复的话:百位有4种选择,十位有3种选择,个位有2种选择,所以有2*3*4=24种 重复:111,112,113,114,121,122,123,124,131,132,133,134,141,142,143,144,211,212,213,214,221,222,223,224,231,232,233,234,241,242,243,244,311,312,313,314,321,322,323,324,331,332,333...