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:

- What are the next two numbers in this series: 2, 9, 16, 23, ...
- How many sides does a hexagon have?
- Are Roman numerals given in small letters or capital letters?
- What is a greater distance: 10 inches or 10 centimetres?
- Give the place value of 5 in the number 254,879.
- If you add 7 to this number, you get 56. What's the number?
- 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? - Add 9 + 1. Then mulitply 9 x 1. Do you get the same answer each time?
- What metric unit of length do the letters 'cm' stand for?
- What is a prime number?

- How many squares are there on a chessboard? (Hint: The answer is not 64.)
- If a movie starts in an hour and a half, how many minutes do you have to wait to see it?
- If 7 is transformed into 13 and 11 is changed to 21 then what does 16 become?
- How many tens equal one thousand?
- How many sides does a triangle have?
- Which is measured from the circle's centre: the radius or the circumference?
- In division, the numeral the dividend is divided by is called...what?
- 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?
- How do you write 23 using only the number 2?

34 using only the number 3?

56 using only the number 5?

100 using only the number 9? - How many sides does a hepatgon have?

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