Q1
What base is hexadecimal?
ABase-16
BBase-10
CBase-2
DBase-8
ICSEClass 8 (ICSE)Computer ApplicationsCh 1 · Topic 2
Topic 2: Introduction to Hexadecimal (Basic)
Hexadecimal (base-16) is a number system using digits 0-9 and letters A-F, often used in computing for representing colours and memory addre
Core concept
Hexadecimal uses sixteen symbols: 0-9 for values zero to nine, and A-F for values ten to fifteen.
How it works
Each hexadecimal digit represents 4 binary digits (bits), making hexadecimal a convenient shorthand for binary numbers.
Why it matters
Hexadecimal is commonly used to represent colours in web design, like #FF0000 for red, and computer memory addresses.
Key detail
Understanding hexadecimal helps us see how computers represent complex information in a more compact, readable format.
Exam highlight
Key diagram
- A picture showing a colour swatch next to its hexadecimal colour code.
Keywords worth remembering
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Quick notes
• Hexadecimal is base-16.
• It uses 0-9 and A-F.
• A-F represent values ten to fifteen.
• Each hex digit represents 4 binary bits.
• Hexadecimal is a shorthand for binary.
• It's used for web colours, like #FF0000.
• It's also used for memory addresses.
• Hexadecimal makes binary more compact and readable.