Question:
Take a look at all these numbers: 66, 22, 99, 33, 44, 55. What number greater than 1 can be divided into all these numbers without leaving a remainder?
Answer:
11.
Try another Brain Teaser:
He who builds me doesn't want me,
he who buys me doesn't use me,
he that uses me doesn't know he's got me.
What am I?