I tore off a part of a newspaper page

Dear all,

Please tell me which of the following sentences are correct. If all are incorrect, please correct them

1) I tore off a part of a newspaper page.

2) I tore a part of a newspaper page off.

3) I tore part of a newspaper page off.

4) I tore a peace of paper off the newspaper.

5) I tore a peace of paper from the newspaper.

6) I tore off a peace of paper from the newspaper.