Question

Aflati nr de forma:
abc stiind ca a=b+c=4
abc stiind ca sunt cife consecutiva cu suma 24
abcd stiind ca a+b+c+d=17 ;a=8 ;b;c si d=nr imape consecutive.
Va rog repede!

Answer 1

abc
a=4
b+c=4
b=1
c=3
a=4

abc-a+b+c=24
a=7
b=8
c=9

abcd=17
a=8
b+c+d=17-8=9
b=1
c=3
d=5

Answer 2

1. 404, 413. 422, 431, 440
2. a+a+1+a+2=24
    3a+3=24
   3a=21
a=7
a+1=8
a+2=9
789

3 a+b+c+d=17
   a=8
___________
b+c+d= 17-8=9
b+b+2+b+4=9
3b+6=9
3b=3
b=1
c=3
d=5
abcd=8135