How many three-digit numbers can be made from digits 0,2,5,7 if the numbers are not repeated.

How many three-digit numbers can be made from digits 0,2,5,7 if the numbers are not repeated. How many of them are even, how many are not even?

In the first place we put any number except 0. There are 3 such numbers. In the second place we put any number except the first. There are 3. In third place we will put any number of the remaining ones: there are 2. Then we multiply all the options: 3 × 3 × 2 = 18. Since. among the numbers 0, 2, 5, 7 equally even and odd, then the three-digit numbers will be equally even and odd: 9 each.