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Solutions de l'énigme de la quinzaine

Une première solution...

 

 

 

1ère proposition :

 12 + 8 = 20
 20x20 = 400
 400 - 4 = 396
 396:4 = 99

(20x(8+12) - 4):4 = 99

Bravo à Eric et Francesco pour ce beau coup Mathador qui rapporte donc 13 points

 

 

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