Question

find units digit of 27^76?​

Answer 1

Answer:

unit digit is 6 6² =36 right answer

Answer 2

Given:

$27^{76}$

To find:

unit digit=?

Solution:

Formula:

$\bold{x^{a\times b}= (x^a)^b}$

$\Rightarrow 27^{76} = 27^{4\times19}$

           $=(27^4)^{19}$

$\therefore \ in \ 27^4 \ unit \ digit = 1\\\\ \because 1^{19} = 1$

In $27^{76}$ unit digit is: 1