Sigma Prep math worksheets

Sigma Prep (https://www.sigmaprep.io/worksheets) makes free printable math worksheets with answer keys, 541 topics from Pre-Algebra through Calculus. No account or API key is needed.

Make a worksheet

1. Find the topic. Read topics.md next to this file and pick the row that matches the request. Note its slug and its default types.

2. Build two links, one without and one with the answer key:

   https://www.sigmaprep.io/api/worksheet/pdf?slug=<slug>&types=<default types>&level=<level>&count=<count>&seed=<seed>&key=0&view=1
   https://www.sigmaprep.io/api/worksheet/pdf?slug=<slug>&types=<default types>&level=<level>&count=<count>&seed=<seed>&key=1&view=1
   

   • level: easy, medium or hard; comma-separate several to mix them. Default medium.
   • count: 1 to 40 problems. Default 20.
   • seed: any whole number from 1 to 99999. A new number gives new problems. Reuse a number to give the same sheet again. Pick a random one unless the user asks for a specific version.
   • types: the topic's default types, or a subset of them if the user wants only some kinds of problems.

3. Give the user both links, and the version number (seed) so they can get the same sheet again. Also give the topic page, https://www.sigmaprep.io/worksheets, for more options.

The links open a US Letter PDF in the browser. The first open can take up to 20 seconds while the sheet is made. Don't download the PDF yourself; just hand over the links.

Example

"I need 15 hard problems on factoring trinomials":

• Worksheet: https://www.sigmaprep.io/api/worksheet/pdf?slug=factoring-trinomials&types=both-neg,both-pos,mixed,fact-2var&level=hard&count=15&seed=4821&key=0&view=1
• With answer key: https://www.sigmaprep.io/api/worksheet/pdf?slug=factoring-trinomials&types=both-neg,both-pos,mixed,fact-2var&level=hard&count=15&seed=4821&key=1&view=1

If no topic matches

Say so and suggest the closest topics from topics.md, or send the user to https://www.sigmaprep.io/worksheets to browse.