the digit in the unit place of number represented by 795..., Numbers, General Mathematics

Question:The digit in the unit place of the number represented by `(7^95 - 3^58)` is :

A 7 
B 0 
C 6 
D 4

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+ AnswerD

+ ExplanationUnit digit in `7^4` is 1.

So, unit digit in `7^92` is 1.`:.` Unit digit in `7^95` is 3. [`:.` Unit digit in `1xx7xx7xx7` is 3] 

Unit digit in `3^4` is 1.

`:.` Unit digit in `3^56` is 1.Unit digit in 3^58 is 9 [`:.` Unit digit in `1xx3xx3` is 9]

`:.` Unit digit in `(7^95 - 3^58)` is 4.
                            [Subtracting unit digit 9 from unit digit 3  ]

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