You can use this abacus to investigate how different number bases work. Common bases in Computing and GCSE Computer Science are base 2 (binary), base 8 (octal) and base16 (hexadecimal).
Click on the beads to slide them left or right. Work in base
The purpose of this abacus is to introduce KS3 Computing and GCSE Computer Science students to different number bases, including binary and hexadecimal.