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Secret code-Spy series

 CRACK THE CODE

"SPY SERIES"

By Panos Kalliantasis

What is the four digit code that unlocks hidden secrets?

A very good exercise to develop mathematical logic and reasoning.

 For young people and for fans of brain tests "Crack the code" Spy series

 

 Support us to continue to offer you trials to keep your mind active.

  Here you can download the answer and the explanation.

 

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