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Starting with an equilateral triangle with 4 matches on each side can you make 2 smaller equilateral triangles by moving just 4 matches? Then can you create 4 smaller Equilateral triangles by moving just 4 matches?

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    _ _  _ _
    \      /
     \    /
      \  /
       \/
 
1. "Fold" the triangle in half, inverting the tip.
 
    _ _  _ _
    \  /\  /
     \/  \/
 
2. Do the same for the two smaller triangles.
 
     _ _  _ _
     \/\/\/\/
 

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  • 1
    $\begingroup$ Nice answer! :-) $\endgroup$ – Phylyp Jan 18 '18 at 11:59
  • $\begingroup$ I was just producing images for the same. $\endgroup$ – prog_SAHIL Jan 18 '18 at 12:00
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    $\begingroup$ @prog_SAHIL - I think the key trick is to get the right answer in quickly, and then embellish it with images/formatting for clarity. The perfect is the enemy of the good. $\endgroup$ – Phylyp Jan 18 '18 at 12:01
  • 2
    $\begingroup$ @prog_SAHIL Sorry (not really!) I have added some ascii art now. $\endgroup$ – Jaap Scherphuis Jan 18 '18 at 12:07

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