aflati suma tuturor nr naturale care impartite la 5 dau catul egal cu restul!!!
Urgent!!!!7Dau coroana!!!!
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Răspuns:
n:5=cat,rest r
cat=rest=0,1,2,3,4<5
n:5=0 rest 0=>n=0
n:5=1 rest 1=>n=1•5•1=6
n:5=2 rest 3=>n=15+3=18
n:5=4rest 4=>4•5•4=24
S=0+6+12+18+2
S=60