nth-child(1)

1

2

3

4

5

nth-child(3)

1

2

3

4

5

nth-child(odd)

1

2

3

4

5

nth-child(even)

1

2

3

4

5

nth-child(n)

1

2

3

4

5

nth-child(3n)

1

2

3

4

5

nth-child(n+2)

1

2

3

4

5

nth-child(2n+1)

1

2

3

4

5

nth-child(3n-2)

1

2

3

4

5