Binary and Hexadecimal Explained: Converting Number Bases
How place value works in binary and hexadecimal, and how to convert between decimal, binary and hex step by step.
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Roman Numerals Explained: How to Read and Write Them
Learn the seven Roman numeral symbols, the subtraction rule, and how to convert years like 2026 and 1994 to and from Roman numerals.
Speed, Distance and Time: The Formula Triangle Explained
Use speed = distance ÷ time to find any of the three, convert units, work with hours and minutes, and read distance–time graphs.
How to Check Your Own Maths Working (and Find the First Mistake)
Simple habits to check your maths answers and spot exactly where a solution went wrong, with a worked example of finding the first wrong line.