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We’re refreshing the questions on our KS3 and GCSE Computer Science subject knowledge assessment. The current version remains available. Updated questions will be available from 18 May 2026.

GCSE

Lesson 2 Number bases

Curriculum > KS4 > Unit > Lesson

Learners will be reminded of how the base-10 number system works, before being presented with the base-2 number system. They will then complete some conversions from binary to decimal and decimal to binary.

Learning objectives

  • Explain the difference between base-2 and base-10 numbers
  • Convert between binary and decimal numbers

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