1. Using the digits 1, 2, 3, 4 without repetition, the greatest 4-digit number that can be made is

2. Using the digits 1, 5, 7, 2 without repetition, the greatest 4-digit number that can be made is

3. Using the digits 3, 5, 7, 0 without repetition the greatest 4-digit number that can be made is

4. The smallest 4-digit number that can be made using the digits 1,8,5,3 without repetition is

5. The smallest 4-digit number that can be made using the digits 5,3,6,4 without repetition is

6. The smallest 4-digit number that can be made using the digits 6, 5, 0, 4 without repetition is

7. Make the greatest 4-digit number by using any one digit of 2. 6. 5 twice.

8. Make the greatest 4-digit number by using any one digit of 0, 3, 6 twice.

9. Make the smallest 4-digit number by using any one digit of 4,3,2 twice.

10. Make the smallest 4-digit number by using any one digit of 7, 0, 6 twice.