Find the unit digit !

This is a very good question on the topic of the number system in which we have to find the unit digit of 22^33^44.

Numbers | 100 Questions | Part 9 | Level - 3

This is a level -3 question on the topic of Numbers , The question may seem a bit tricky but if you know the concept then it will be very easy for you .

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The problem discussed in the video :

Find the unit digit of 22^33^44

The solution to the problem: Follow the following steps,

1. First find the last two digits of 33^44 and take it as X.

2. Then find the unit digit of 22^X

3. The final answer is 2

Practice Question provided at the end of the video.

if f^n(x) = f( f^n-1(x)) , where n is greater than 1, and f(x) = (x-1)/(x+1) then find the value of f^120(x) , n is a natural number .

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