Răspuns :
o saptamana are 7zile
si in 21 zile = 21:7=3
=3 saptamani
in 35 zile= 31:7=5
=5 saptamani
in 49 zile =49:7=7
=7 saptamani
in 63zile= 63:7=9
=9 saptamani
si in 21 zile = 21:7=3
=3 saptamani
in 35 zile= 31:7=5
=5 saptamani
in 49 zile =49:7=7
=7 saptamani
in 63zile= 63:7=9
=9 saptamani
In 21 zile sunt 3 saptamani
21:7=3 saptamani
35 zile sunt 5 saptamani
35:7=5
49 zile sunt 7 saptamani
49:7=7
In 63 zile sunt 9 saptamani
63:7=9