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General Mathematics · Chapter 1.1

The Number System

Meet the kinds of numbers we use, how place value works, and what makes a number prime.

Version 0.2.0Released 2026-10-08Licence CC BY-NC 4.0

Demo content. This is test data, not real textbook text.

What changed in this version: Demo release: adds credits, version history and a note on zero as a placeholder.

By the end of this chapter you can

  • Name the kinds of numbers and say which set a number belongs to.
  • Use place value to read and compare numbers.
  • Find the prime factors of a number.

Topics

  1. 1.1.1Kinds of numbers
  2. 1.1.2Place value and ordering
  3. 1.1.3Factors, multiples and primes
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Version history

  1. 0.2.0 2026-10-08
    Demo release: adds credits, version history and a note on zero as a placeholder.
  2. 0.1.0 2026-10-08
    Demo release for testing the site. The text is test data, not a real chapter.

Older versions are kept as PDFs on the previous versions page.