Răspuns:
x:37=c rest r
r<i => r<37 =>r∈{0,1,2....,36}
x=37·c+r
vom da valori din multimea mentionata mai sus
x=37·0+0=>x=0
x=37·1+1=>x=38
.
x=37·36+36=>x=1368
x are 37 de valori
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x:8=13 r =>r<i
r∈{0,1,2...,7}
x=13·8+0=104
x=13·8+1=105
x=13·8+2=106
.
x=13·8+7=111
nr formate sunt 104,105,106,107,108,109,110,111
104+105+106+107+108+109+110+111=860 suma
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a-b=348
a:2b=1r65=>a=2b+65
inlocuim in prima relatie
2b+65-b=348
b=348-65
b=283
a=2·283+65=631
