1. Take two digits, say 1 and 2. Make the greatest 4-digit number using both the digits equal number of times.

2. Take two digits, say 3 and 4. Make the smallest 4-digit number using both the digits equal number of times.

3. Take two digits 0 and 1. Make the greatest 4-digit number using both the digits equal number of times.

4. Take two digits, 0 and 1. Make the smallest 4-digit number using both the digits equal number of times.

5. Make the greatest 4-digit number using any four different digits with the condition that 5 is at ones place.

6. Make the smallest four-digit number using any four different digits such that 5 is at ones place,

7. The greatest 2-digit number is

8. The smallest 2-digit number is

9. The greatest 3-digit number is

10. The smallest 3-digit number is