Question

The unit digit in the product (127)^170.
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Answer 1

Answer:

the unit digit is 9

because 170=4×42+2

so we get remainder is 2 so 7^2=49 , in this unit digit is 9

Answer 2

Answer:

The answer is 9. Because for every 4 times of product the unit digits are repeating

Unit digits:

1. 7^1=7
2. 7^2=9
3. 7^3=3
4. 7^4=1
5. 7^5=7
6. 7^6=9 and so on.....like these