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:

- How many sides does an octagon have?
- 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? - 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?
- How many tens equal one thousand?
- Change this into a multiplication problem; 5+5+5+5=20
- Is a peck larger than a bushel?
- How many metres are in a kilometre?
- 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 sides does a triangle have?
- A farmer has seventeen sheep. All but nine of them die. How many sheep does he have left?

- How many inches are in a foot?
- Are Roman numerals given in small letters or capital letters?
- How many squares are there on a chessboard? (Hint: The answer is not 64.)
- How many centimetres are in a metre?
- What is a prime number?
- What are the next three numbers in this series: 14, 21, 28, 35,...
- What number is 6 more than 7 x 8?
- What is the next number in this sequence: 2, 5, 9, 14,...
- What is a greater distance: 10 inches or 10 centimetres?
- You are 9 years old and your dad is 47. How old will your dad be when you are 21?

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