AQA 8525 3.3.2: Converting between number bases
The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.
What it covers
We count in denary (base 10): ten digits, and each place is worth ten times the one to its right. Computers count in binary (base 2): two digits, and each place is worth twice the one to its right. Converting between them is a skill every exam tests, and BugBot can play a number to you in binary.
- Place values
- Binary to denary in Python
- Denary to binary
- Hear a number
Or do it in the simulator, with tasks that mark themselves
Lessons that teach it
- F8.2 Binary and denary Data representation
Converting 8-bit numbers both ways, and hearing them on the buzzer. - F8.3 Hexadecimal Data representation
Base 16, converting to binary and denary, and the LED's colour codes. - F13.5 Number and data questions Exam preparation
Conversions, units and file sizes at speed, with the checks that catch mistakes.
Try it on a robot
The task from F8.2 Binary and denary, running here. Change the program and press Run.
Past paper questions on this
Real exam questions that test this, each worked through with a program you can run.
The specification is AQA's own document; this page says which of our lessons teach point 3.3.2 and is not endorsed by the board.