I always loved doing tricks like these on my friends!
This classic clip “proves” how 25/5 = 14, and does it three different ways. Maths is a powerful method for providing proof – but we need to be careful that each step is based on correct assumptions.
One of the most well known fake proofs is as follows:
let a = b
Then a2 = ab
a2 – b2 = ab – b2
(a-b)(a+b) = b(a-b)
a+b = b (divide by a-b )
b+b = b (as a = b)
2b = b
2 = 1
Can you spot the step that causes the proof to be incorrect?
Another well known maths problem that appears to prove the impossible is the following:
This was created by magician Paul Curry – and is called Curry’s Paradox. You can work out the areas of all the 4 different coloured shapes on both triangles, and yet by simply rearranging…
View original post 296 more words