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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.)

  

 

Circles do they turn ?

 

Ilusion óptica

 

Staring the focus for a few seconds and move the head forward and backward.

 

Do the circles revolve ?