Răspunsuri

2014-11-10T12:41:15+02:00
1.  n = 15 a +r    15 > r = 2a  ⇒   r ∈ {2,4,6,8,10,12,14} ⇒ a ∈ { 1,2,3,4,5,6,7} 
⇒  n =15a+2a  = 17a  ⇒  n ∈ { 17,34,51,68,85, 102, 119}
9 3 9