Unit Digit

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

1

4

6

9

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

5

2

8

7

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

2

4

6

8

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

2

4

6

8

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

3

4

5

9

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

2

4

6

8

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

4

6

2

8

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

1

3

7

9

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

1

3

7

9

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

1

5

7

9