The secret of Karl

What is 1 + 2 + 3 + . . . + 50 + 51 + . . . + 98 + 99 + 100?

A famous story tells that this was the problem given by a elementary school teacher to a famous mathematician to keep him busy. Do you know that he was able to get the sum within seconds only? Can you beat that? His name was Karl Friedrich Gauss (1777-1885).

Do you know how he did it?








kailangan ng matinong solution. report agad kapag hindi matino.​