825

Posted on 30 December 2016 by Christos Loizos — Leave a comment

Ερωτηματάκι του λεπτού (σαν θερμόμετρο) από εξετάσεις μαθηματικών για SAT

Πόσα ζεύγη πρώτων αριθμών έχουν άθροισμα 825;

Α.0
Β.1
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