For once, our brain teaser is actually not that hard. About one in three people we tested it on got it right. See, we gave it to nine people and three got it right. (We know how to reduce our fractions.) Of course two of them said they’d heard it before, but at least they’d remembered it.

So without further ado — whatever that means– here’s the Mind Masher.

Two women are applying for a passport at the passport office. They look just like each other. When the passport officer looks at their applications, she notices that they have the same father and mother, they were born in the same city, and their birth dates are the same. “Oh,” the officer says to them, “you must be twins.”

“No,” the two women say together.

How is this possible?

Click here to see the result of your intense brain work.