Prime & Composite worksheets

Free printable prime & composite worksheets with answer keys, prime and composite numbers. Pick a grade below for ready-made PDFs, or generate a fresh one. Every answer is computed in code, so the key is never wrong.

Grade 4 Prime & Composite

All Grade 4 worksheets →

Set A

Printable PDF · answer key

Set B

Printable PDF · answer key

Set C

Printable PDF · answer key

Set D

Printable PDF · answer key

Set E

Printable PDF · answer key

Set F

Printable PDF · answer key

Grade 5 Prime & Composite

All Grade 5 worksheets →

Set A

Printable PDF · answer key

Set B

Printable PDF · answer key

Set C

Printable PDF · answer key

Set D

Printable PDF · answer key

Set E

Printable PDF · answer key

Set F

Printable PDF · answer key

Grade 6 Prime & Composite

All Grade 6 worksheets →

Set A

Printable PDF · answer key

Set B

Printable PDF · answer key

Set C

Printable PDF · answer key

Set D

Printable PDF · answer key

Set E

Printable PDF · answer key

Set F

Printable PDF · answer key

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