Question

Aflati cel mai mic numar care impartit pe rand la numerele12,18 si 20 da ,de fiecare data restul 5

Answer 1

a:12= c₁ rest 5⇒a=12xc₁+5
a:18=c₂ rest 5⇒a=18xc₂+5
a:20=c₃ rest 5⇒a=20xc₃+5
a=cmmmc al numerelor(12, 18, 20)=2²·3²·5=180
a=180+5=185 (deimpartitul) 
Verific:
185:12=15 rest 5
185:18=10 rest 5
185:20= 9 rest 5