Half of them. Every other number from 0 to 99998 is even.
Since there are 90,000 five digit numbers, that means that 45,000 of them are even.
To find the number of even five-digit whole numbers, we first note that a five-digit number ranges from 10,000 to 99,999. The last digit must be even, which can be 0, 2, 4, 6, or 8 (5 options). The first digit can be any digit from 1 to 9 (9 options), and the three middle digits can each be any digit from 0 to 9 (10 options each). Thus, the total number of even five-digit whole numbers is (9 \times 10 \times 10 \times 10 \times 5 = 450,000).
25
100
Not sure what a "didget" is. It is possible to make 18 5-digit numbers.
500 or so.
With a total of 90,000 five digit numbers, we can conclude that there is 45,000 EVEN five digit numbers.
There are five such numbers.
To find the number of even five-digit whole numbers, we first note that a five-digit number ranges from 10,000 to 99,999. The last digit must be even, which can be 0, 2, 4, 6, or 8 (5 options). The first digit can be any digit from 1 to 9 (9 options), and the three middle digits can each be any digit from 0 to 9 (10 options each). Thus, the total number of even five-digit whole numbers is (9 \times 10 \times 10 \times 10 \times 5 = 450,000).
There are 252 of them.
25
90000
100
4,000 even numbers, 4,000 odd numbers.
There are 5460 five digit numbers with a digit sum of 22.
162
There are 180 3-digit numbers divisible by five.
2240