Welcome to NumberSystems.study

Master number system conversions and binary arithmetic with interactive practice questions.

Number system conversions
Binary, hexadecimal, and decimal conversions
Binary arithmetic
Addition, subtraction, multiplication
Two's complement
Signed binary representation
Bit operations
Bit shifting
Fixed-point numbers
Fractional binary representation
Floating-point numbers
With mantissa and exponent

Questions answered

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Total practice questions completed by students

For students

Practice number system conversions and binary arithmetic with unlimited questions designed for GCSE and A-level computer science courses.

  • Unlimited practice questions
  • View your progress as you answer questions
  • Matches exam question complexity
  • Instant feedback
  • Hints and explanations available

Example KS3/GCSE question

Denary to binary question example

Example A-level question

Two's complement question example
Student guide

For teachers

A straightforward way for students to practice number system conversions and binary arithmetic with unlimited questions designed for GCSE and A-level computer science courses.

  • Create custom Question sets to match any exam board course
  • Distribute share links for guided student practice
  • Instant engagement, no login needed for students or teachers
  • Perfect for Do Now/Starter, Exit Ticket/Plenary and homework
  • Students can show their progress with you via the view progress page
Educational focus

Questions are designed to match the difficulty level found in GCSE and A-level computer science examinations.

Teacher guide