Question

Determinati cifrele a,b,c din sistemul zecimal de numere daca: abcd+abc+ab+a=1501

Answer 1

abcd+abc+ab+a=1501,

d+c+b+a=11

, c+b+a=9,

b+a=4,

a=1,b=3.c=5,d=2

1352+135+13+1=1501

b

10a+b=3(a+b), 7a=2b, a=2, b=7, numarul 27