1. 216
2. 60
3. 24
4. 25
Answer:- 2. 60
Unit digit can be 5
There is possible way to fill the unit place and the other places are filled by 2, 3, 6, 7, or 9.
Total numbers that are formed: 1*5*4*3=60
60 four-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9.