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GCSE Computer Science · key term
The base-16 number system, using digits 0–9 and letters A–F. A–F represent denary values 10–15.
Used by OCR
Paper 1
Revise: Denary and Hexadecimal ConversionHexadecimal, often shortened to hex, is base 16, so it needs sixteen different digits. It uses 0–9 followed by A–F.
A base-16 number system that uses the digits 0–9 and letters A–F, with A–F representing denary values 10–15.
For denary to hexadecimal, use the whole-number quotient and remainder, not the decimal part of a division.
Write two hexadecimal digits: denary 10 becomes 0A, not just A.
Check a denary-to-hexadecimal answer by multiplying the left digit’s value by 16 and adding the right digit’s value.
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A base-16 number system using the digits 0–9 and the letters A–F.