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Descopera regula si completeaza: 12, 20, 35

Răspuns :

12,20,35,43,58,66,81,89,104.......etc
SE ADUNA CU 8, APOI 15, 8 APOI 15 ETC.
12, 20, 35, 43, 58, 66, 81, 89, 104, 112, 127, 135, 150, s.a.m.d.