500 or so.
There are 12 such numbers.
9,000
There are 320 such numbers.
There are 7200 such numbers.
100
2240
500
5*5*4*4 = 400
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
7000 - 999 ie 6001 four digit numbers
900 numbers
There are 12 such numbers.
9,000
There are 320 such numbers.
256 unless you count zero in which case its 625.
90
There are 7200 such numbers.