These brain teasers have been submitted by our visitors from all around the world. These quiz questions are fun for the brain and will puzzle you for some time.

We have lots more puzzles to provide fun for your brain. Have fun solving these quiz questions. Choose from the following brain games:

- 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?
- What is the Roman numeral for 500?
- What metric unit of length do the letters 'cm' stand for?
- How many sides does a decagon have?
- This riddle must be done IN YOUR HEAD and NOT using paper and pen or a calculator. Try it!

Take 1000 and add 40 to it. Now add another 1000 to it.

Now add 30. And another 1000.

Now add 20. Now add another 1000. Now add 10.

What is the total? - How many metres are in a kilometre?
- How many inches are in a foot?
- You have $10.60 in two bills and three coins. What bills and coins do you have?
- Which number should replace the question mark? 1, 4, 7, 10, 13, ?, 19
- A boy and his big sister are sitting around the kitchen table chatting.

The boy says, "If I take two years away from my age and gave them to you, you'd be twice my age."

The sister added, "Why don't you just give me one more and then I'll be three times you age."

How old are the siblings?

- How many centimetres are in a metre?
- What is a prime number?
- Which is correct: Seven and five is thirteen or Seven and five are thirteen?
- How many sides does a pentagon have?
- What are the next two numbers in this series: 2, 9, 16, 23, ...
- How many feet are in a yard?
- A man weighing 14 stone and his two sons weighing 7 stone each were stranded on an island. All they had to get off the island was a small boat, but it could only hold 14 stone. How did the man and his sons get off the island?
- If a movie starts in an hour and a half, how many minutes do you have to wait to see it?
- What are the next three numbers in this series: 14, 21, 28, 35,...
- 10 candles stand burning in a dining room. A strong breeze blows in through an open window and extinguishes 3 of them. Assuming the wind doesn't extinguish any more candles, how many candles do you have left in the end?

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