Question

please help me with this question step by step please​

Answer 1

Answer:

1+6=7 is the answer

Step-by-step explanation:

for 17^256 last digit is 7 so the possible powers of 7 are

7^1=7---(1)

7^2=49 so the last digit here is 9----(2)

7^3=343so here is 3---(3)

7^4=2301 so-----1--(4)

7^5=16107 last digit is again 7 so only 4 possible last digits

so 256/4=64 that is exactly divisible by 4 I. e, remainder is 0 so last digit is 7^0=1

same apply for 256^17 you will get 6 as the answer

so 1+6 is 7