I have as many brothers but my brothers have twice the number of sisters as brothers.How many of us are there?

http://en.allexperts.com/q/Puzzle-Solving-1841/2008/4/mathlogic-puzzle.htm

I believe you left out some words. Shouldn't the question be?

I have as many brothers as sisters but my brothers have twice the number of sisters as brothers.How many of us are there?

http://www.funshun.com/fun-stuff/riddle-72-5935.html

Let's break down the problem to find the answer.

You have as many brothers as the total number of siblings minus yourself. Let's represent the total number of siblings as "x". So, your number of brothers would be x - 1, because you are one of the siblings.

Your brothers have twice the number of sisters as brothers. Since you are one of their sisters, the number of sisters they have is x - 1 + 1 = x.

Therefore, the equation we have is:
x = 2(x - 1)

Now we can solve this equation to find the value of x, which represents the total number of siblings:

x = 2x - 2
2 = x

So, there are two siblings, including yourself.