I've memorised all the digits of π. Now I just need to remember the order they come in.
The first proof for 1 + 1 = 2 can be found in a book called 'Principia Mathematica' written in 1910 by two British Mathematicians (B.Russell and A.N.Whitehead).
The proof is 360 pages long!!!
10² + 11² + 12² = 13² + 14²
Numbers that can be expressed using only their own digits and the symbols +, -, ×, ÷, () and ^ are called Friedman numbers.
Here are some examples:
Document from a bank showing a summary of your account activity (incoming and outgoing amounts) over a certain period of time.
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