use the equation (n+k-1)C(k-1); where n=8 and k=3. 10C2=45. now use the same equation and substitute 2 for k. you get 9C1. 9C1=9. 45-9=36
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2240
4,536 whole numbers or mixed numbers. 5,040 pure decimals.
There are 625 of them - too many to list.
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
12 numbers