Divisibility

Divisibility asks whether a quantity can be partitioned into equal groups with no remainder; digit tests are consequences of place-value structure rather than magic rules.

What you'll learn

  • Interpret divisibility as equal grouping with remainder zero.
  • Use divisor, factor, and multiple with distinct meanings.
  • Explain divisibility tests for 2, 5, 10, and 9 from place value.
  • Use a digit test only under its justified condition and retain remainder information.

Before you start

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