Răspuns :
83÷n=c rest 3
⇒83=n×c+3;⇒n×c=83-3⇒n×c=80;
65÷n=c rest 1
⇒65=n×c+1;⇒n×c=65-1⇒n×c=64;
⇒n∈[8];
⇒83=n×c+3;⇒n×c=83-3⇒n×c=80;
65÷n=c rest 1
⇒65=n×c+1;⇒n×c=65-1⇒n×c=64;
⇒n∈[8];