Question

Determinati numarul abc care impartit la 5 sa dea catul bc si restul a

Answer 1

    abc:5=bc rest a
=>abc+a= nr.abc
=>(abc+a):5=((bc+a)*5)+a
=>(4a*5):5=a
 a=(4*5):5
 a=20:5
 a=4

=>(4bc+4):5=((bc+4)*5)+4
=>(2*5):2=c
 c=10:2
 c=5

=>(4b5+4):5)=((b5+4)*5)+4
=>b=a+c
=>b=4+5
 b=9

=>(495+4):5=((95+4)*5)+4
=>499:5=99*5+4
=>499:5=495+4
=>499=499

numarul abc=499

abc:5=bc rest a
499:5=99 rest 4

abc=495+4
abc=499