What is the fastest way to double your money?

Can you quickly find which two matchstick figures are identical?

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.

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I look at you, you look at me, I raise my right, you raise your left. What am I?