Which numbering system uses digits 0-9?

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Prepare for the CodeHS AP Computer Science Principles Exam with multiple choice questions, detailed explanations, and helpful hints. Boost your confidence and get ready for your exam!

Multiple Choice

Which numbering system uses digits 0-9?

Explanation:
Digits 0 through 9 are used in a base-10 system, where each place value is a power of 10. That’s why it’s called decimal. For example, 3,274 means 3×10^3 + 2×10^2 + 7×10^1 + 4×10^0. Other numbering systems use different symbol sets: binary uses only 0 and 1, octal uses 0–7, and hexadecimal uses 0–9 plus A–F for 10–15. So decimal is the system that relies on ten distinct digits, 0 through 9.

Digits 0 through 9 are used in a base-10 system, where each place value is a power of 10. That’s why it’s called decimal. For example, 3,274 means 3×10^3 + 2×10^2 + 7×10^1 + 4×10^0. Other numbering systems use different symbol sets: binary uses only 0 and 1, octal uses 0–7, and hexadecimal uses 0–9 plus A–F for 10–15. So decimal is the system that relies on ten distinct digits, 0 through 9.

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