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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Prime numbers

Mathematics · Multiplication & Division · conceptual

Know and use the vocabulary of prime numbers, prime factors, and composite numbers; establish whether a number up to 100 is prime; recall prime numbers up to 19

What mastery looks like

  • Explain that a prime number has exactly two factors: 1 and itself
  • Determine whether 51 is prime or composite and justify the answer
  • List all prime numbers up to 19 from memory

Check your understanding

Can Prime numbers tell you what makes a number 'prime' — that it only divides exactly by 1 and itself — and give some examples like 7, 11, and 13?

Prerequisites

Required first

Unlocks (0 directly)

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