Question

Aflati toate numerele carenimpartite la 15 dau restul egal cu dublul catului

Answer 1

x:15=c,r
r=c*2
-----------
x=?
c=?
r=?

daca ...r=c*2...=>r=2;4;6;8;10;12;14....si ..c=1;2;3;4;5;6;7   =>...x=15*c+r


x=15*c+r
c=1
r=2
x=15*1+2
x=15+2
x=17

17:15=1 rest 2...........(r=c*2...=> c=1  si  r=2)

c=2..=>r=4
x=15*2+4
x=30+4
x=34

34:15=2 rest 4

c=3..=>r=6
x=15*3+6
x=45+6
x=51

51:15=3 rest 6

=> 68:15=4 rest 8
     85:15=5 rest 10
     102:15=6 rest 12
     119:15=7 rest 14