Unit Digit

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

4

6

2

8

2.		Find the unit digit of 3^19.

1

3

7

9

3.		Find the unit digit of 7^10 + 8^12 + 9^13.

2

4

6

8

4.		What is the last digit of the number 2^10 + 3^10 + 4^10 + 5^10?

3

4

5

9

5.		What is the last digit of the number 7^11?

1

3

7

9

6.		What is the unit digit of 2^20?

2

4

6

8

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

1

3

7

9

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

1

4

6

9

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

4

6

2

8

10.		Find the unit digit of 5^10 + 6^12 + 7^13.

2

4

6

8