Mathematical Puzzle #3


Welcome to our "Mathematical Puzzle" Series!

Another mind-boggling question for you! 

Find the below proof of the fact that 4=5.

Start from
Write this as
Rewrite as
Add 81/4 on both sides:
These are perfect squares:
Take the square root of both sides:

Add 9/2 on both sides:

You & I know- this is obviously ambiguous!

Why not crack the mistake then?!

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Last Date for submisssion:- 30th November, 2021

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