Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**Math Guy****Member**- Registered: 2005-10-12
- Posts: 20

RAY: This puzzler is from the matchstick series. Imagine, if you will, that you have four matchsticks of equal length. From those, you can easily make a square.

At each of the vertices, there is a right angle, or a ninety-degree angle, so there are four right angles.

TOM: I'm with you!

RAY: Now, using those same four matchsticks, make not 4 but 16 ninety-degree angles.

You might say, "Can I use the third dimension?" You can use any dimension you want.

I should mention, you are not allowed to fold, bend, break staple, or mutilate the matches in any other way.

TOM: Can you use mirrors?

*Leave your response here! Please!

RAY: No, but that shows you're on the right track.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,559

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

I'm not good at visualising things, so I don't know if MathsIsFun's solution works. Here's mine.

Why did the vector cross the road?

It wanted to be normal.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,559

Doh! It's neater than mine!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**justlookingforthemoment****Moderator**- Registered: 2005-05-26
- Posts: 2,161

No! It doesn't show on the pink background.

*Last edited by justlookingforthemoment (2005-11-09 17:20:41)*

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**Math Guy****Member**- Registered: 2005-10-12
- Posts: 20

congratulations all, it looks like a

!*Last edited by MathsIsFun (2005-11-15 17:15:29)*

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,559

... I muffled your answer.

Great little puzzle.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**jU****Real Member**- Registered: 2005-08-17
- Posts: 1,923

yes it is

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**Mick****Member**- Registered: 2005-11-29
- Posts: 1

I hope I do this right, I am looking for the history and origin of the matchstick puzzle. Does anyone know where I might find this information?

Thank you in advance

Mick

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