Question

what is the last digit of the number 42 power 42 ? Please, its urgent... ​

Answer 1

Given :    42⁴²      42 power 42

To find : Last Digit

Solution:

42⁴²

= 42⁴⁰ * 42²

= (42⁴)¹⁰ * 42²

2⁴  - ends with 6    

6¹⁰  end with 6

=>  42⁴⁰  ends with 6

now 42²  ends with  4

6 * 4 = 24

Hence 42⁴² end with  4

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