Toolbox

Every tool here exists because a module needed it.

No account, nothing to install, and everything runs in your browser. They are grouped by subject, so you can start from the kind of problem you are stuck on.

Mathematics and Optimization

Calculator

A scientific calculator that keeps your history on screen, so you can retrace a long computation.

Foundational Mathematics

Matrices

Multiply, invert, transpose and row-reduce, with each operation shown as you go.

Linear Algebra

Statistical Tests

Run the inference tests from the stats course and read which hypothesis the result supports.

Statistics

Simplex Solver

Solve a linear programme tableau by tableau, the way the exam asks you to show it.

Operations Research

Digital Systems

K-map Solver

Simplify a Boolean expression on a Karnaugh map and see which cells were grouped, so you can check your working and not just the answer.

Digital Systems

Number Systems

Convert between binary, octal, decimal and hex with the intermediate steps written out.

Digital Systems

Computer Science

Algorithm Visualiser

Step through sorts, traversals and shortest-path algorithms at your own pace, forwards or back.

Data Structures and Algorithms

SQL Playground

Write and run real queries against a sample database in the browser. Nothing to install.

Databases

Cryptography Suite

Classical ciphers, modular arithmetic, RSA and modular inverses, each worked out in full.

Security

Regex Tester

Test a pattern against your own text and see exactly what each group captured.

Any module with parsing in it

Missing the one you actually need?

Most of these started as somebody asking for them. Tell us which module is giving you trouble and what would help.

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