Unit Digit

1.		Which of the following numbers is divisible by 9?

108

237

405

551

2.		Find the unit digit of 3^19.

1

3

7

9

3.		What is the last digit of the number 9^18?

1

3

7

9

4.		What is the unit digit of 8^15?

4

6

2

8

5.		What is the last digit of the number 3^20?

1

3

7

9

6.		What is the last digit of the number 2^17?

1

2

3

4

7.		Find the unit digit of 2^15 + 3^16 + 4^17.

1

5

7

9

8.		What is the unit digit of 6^15?

4

6

2

8

9.		What is the unit digit of the number 5^17?

5

2

8

7

10.		What is the unit digit of 4^12?

2

4

6

8