Q1
How many digits are used in our number system?
ATen (0-9)
BFive
CTwenty
DOne
ICSEClass 6 (ICSE)MathematicsCh 1 · Topic 1
Number System (Numeration)
The number system helps us represent and understand numbers, including natural numbers, whole numbers, and how numbers are structured using
Core concept
Numbers are represented using ten digits (0-9), and their position in a number determines their value, called place value.
How it works
We use the Hindu-Arabic numeral system, where each place (ones, tens, hundreds) represents a power of 10.
Why it matters
Understanding numeration also involves reading and writing numbers correctly in words and figures.
Key detail
A strong grasp of the number system forms the foundation for all other mathematical operations and concepts.
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• Numbers use ten digits (0-9).
• Position determines a digit's value (place value).
• We use the Hindu-Arabic numeral system.
• Places represent powers of 10: ones, tens, hundreds.
• Numeration involves reading and writing numbers.
• This applies to both words and figures.
• Number system knowledge is foundational.
• It supports all other maths operations.