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Puzzles, situation puzzles and recreational mathematics.

situation puzzles and recreational mathematics. Neuron juice
 
 
 

Neuron juice.

The important thing is not to stop questioning. (Albert Einstein.)

  

 

Einstein or Marilyn.

Ilusion óptica

 

When you look at this photo you are seen to be Albert Einstein , but if you look from 4 meters away will become Marilyn Monroe.