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puzzlescurriculumIntegerZone
Code and content: © Philip Dorrell. Published with permission.
The integers are displayed in a grid, which can be scrolled up and down and resized. You choose a mode, and this defines the interactivity. Some of the modes are for investigating, others help you test your knowledge and calculation skills.
IE 4.0 or Netscape 4.5 or other Java 1.1 compatible browser required.  
  • Arithmetic: addition, subtraction, multiplication and division.
  • Factorization : explore and test.
  • Highest common factors and lowest common multiples.
  • Using the Euclidean algorithm to find HCF's.
  • Multiples of a number : explore and test.
  • Tables Tests: addition, subtraction, multiplication and division.
  • Modulo arithmetic: addition and multiplication.
  • Casting out nines.
  • Primes: explore and test, prime factorization.
  • The Sieve of Eratosthenes.

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