Blonds are not stupid

A group of Blonds are trying to prove they are not stupid. So one blond goes up and the dark haired man asks the blonds what is the sum of two plus three, the blond replies four. The blond crowd shouts give her another chance.

So dark haired man asks the blonds again what is the sum of two plus three, the blond replies six. The blond crowd shouts give her another chance.

So dark haired man asks the blonds again what is the sum of two plus three, the blond replies five. The blond crowd shouts give her another chance.