{(6374) pow 1793 * (625) pow 317 * (341) pow 491}
Lets see the unit digit of all these numbers we are confident about 625 and 491 our unit digits will always be 5 and 1 respectivly
Lets have a look at 6374 now
We know and 4 pow 2 will give us unit digit as 6 after that to any power our unit digit will be 6
Lets rewrite it as
(6347 pow 2) pow 896
Hence we can take final init digits as
6*4*5*1=120
Hence unit digit is 0.
Lets see the unit digit of all these numbers we are confident about 625 and 491 our unit digits will always be 5 and 1 respectivly
Lets have a look at 6374 now
We know and 4 pow 2 will give us unit digit as 6 after that to any power our unit digit will be 6
Lets rewrite it as
(6347 pow 2) pow 896
Hence we can take final init digits as
6*4*5*1=120
Hence unit digit is 0.
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