The greatest 4-digit number with no repeated digits is... 9876
98,764
98,764
98,764
987,654
It is 9998, or if the digits can't be repeated, it is 9876.
Proceed from left to right, using the largest possible digit in each position.
The greatest 2-digit even number is 98
642
Th e greatest 4-digit even number is 9,998 .
10234
0.124