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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | math.youngzones.org | 2 | 178 | 95 |
| 2 | answers.yahoo.com | 8 | 26200000 | 127000000 |
| 3 | wiki.answers.com | 7 | 1960000 | 11800000 |
| 5 | cut-the-knot.org | 6 | 30800 | 37000 |
| 6 | mathforum.org | 8 | 115000 | 375000 |
| 7 | boards.washingtoncaps.com | 4 | 8640 | 23800 |
| 8 | mathcentral.uregina.ca | 6 | 6640 | 16000 |
| 9 | parishepiscopal.org | |||
| 10 | en.wikipedia.org | 8 | 61800000 | 3750000 |
| 11 | www4.uwm.edu | 7 | 32800 | 46300 |
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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | siths.org | 5 | 199 | 2540 |
| 2 | en.wikipedia.org | 8 | 61800000 | 3750000 |
| 3 | hotmath.com | 5 | 5660 | 48500 |
| 4 | mathforum.org | 8 | 115000 | 375000 |
| 5 | cut-the-knot.org | 6 | 30800 | 37000 |
| 6 | members.cox.net | - | 695000 | 114000 |
| 8 | pde.state.pa.us | 7 | 194000 | 56900 |
| 9 | csm.astate.edu | 5 | 946 | 14700 |
| 10 | mathcentral.uregina.ca | 6 | 6640 | 16000 |
| 11 | ops.org | 6 | 6690 | 18500 |
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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | en.wikipedia.org | 8 | 61800000 | 3750000 |
| 2 | cut-the-knot.org | 6 | 30800 | 37000 |
| 3 | connectedmath.msu.edu | 6 | 1290 | 283 |
| 4 | geom.uiuc.edu | 7 | 10500 | 6930 |
| 5 | onemathematicalcat.org | 3 | 192 | 399 |
| 6 | glencoe.com | 6 | 60700 | 90300 |
| 7 | hotmath.com | 5 | 5660 | 48500 |
| 8 | tutorvista.com | 5 | 29900 | 114000 |
| 9 | mathcentral.uregina.ca | 6 | 6640 | 16000 |
| 10 | shodor.org | 7 | 33500 | 23700 |
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