999,998
7542
88888888
7314
6*6*3 = 108 numbers.
How about 256
9650 is the largest formed by re-ordering the digits.
Try 130. Or how about 310.
Assuming the question refers to the digits 1, 2, ... , 9 the answer is 1344 numbers.
9998
985
998 - 3 digits even number Next even number is 1000 - 4 digits. So 998 is the largest ...
There is no such number. If the four digits are even, the entire number is even, not odd.