Question

The remainder when (20)^23 is divided by 17 is :
(a) 11
(b) 3
(c) 6.
(d) can't be determined
please solve this step by step.​

Answer 1

Answer:

By Fermat’s little theorem we have,

20^17=20mod17

20^17=3mod17

20=3mod17

20^3=27mod17

20^6=10^2mod17

20^6=15mod17

20^17*20^6=15*3mod17

20^23=11mod17.

So, the answer is 11.

Step-by-step explanation:

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Answer 2

Answer:

I think options a

Step-by-step explanation:

is correct answer