Question

Cate numere impartite la 6 dau catul cel putin 2 si cel mult 5?

Answer 1

a:6=2 rest 0,1,2,3,4,5(deoarece restul<6)
=>a=12,13,14,15,16,17
a:6=3 rest 0,1,2,3,4,5
=>a=18,19,20,21,22,23
a:6=4 rest 0,1,2,3,4,5
=>a=24,25,26,27,28,29
a:6=5 rest 0,1,2,3,4,5
=>a=30,31,32,33,34,35
In total 4x6=24 numere(ptr ca avem 4 caturi diferite si cate 6 solutii la fiecare ecuatie)
sper ca te-am ajutat

Answer 2

x=6k+r
k≥2
k<5
r<6
k∈{2,3,4}
r∈{0,1,2,3,4,5}  ⇒ x∈{12,13,14,...,29}
29-12+1=18 nr