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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