Salut !
[tex]n \times \frac{1}{2},n \times \frac{1}{3},n \times \frac{1}{5} apartine N[/tex]
[tex][2,3,5]=30 = > [/tex]
[tex]30 \times \frac{1}{2} = 15[/tex]
[tex]30 \times \frac{1}{3} = 10[/tex]
[tex]30 \times \frac{1}{5} = 6[/tex]
=> n=30(răspunsul)
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