7542
88888888
998 - 3 digits even number Next even number is 1000 - 4 digits. So 998 is the largest ...
5214, 4512, 2154, 2514 etc.
There is no such number. If the four digits are even, the entire number is even, not odd.
It must end with a zero, since that's the only even digit.
999,998
88888888
7314
6*6*3 = 108 numbers.
9650 is the largest formed by re-ordering the digits.
How about 256
Try 130. Or how about 310.
Assuming the question refers to the digits 1, 2, ... , 9 the answer is 1344 numbers.
9998
985
501396
5214, 4512, 2154, 2514 etc.