What has 13 hearts but no other organs?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

How can you tell a raw egg from a hard-boiled egg?

When we see 2 but call 10?

What does Alexander the Great and Winnie the Pooh have in common?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6