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CompTIA Tech+ 1.2
TechKnowSurge Catalog Interactives Number Base Odometer
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Number Base Odometer

Watch a single value change across number systems at once, building an intuitive feel for how decimal, binary, hex, and octal relate to each other.

⚑ Complete this interactive to capture a CTF flag worth 1 point.

About this interactive

What you're seeing: a live counter that shows the same value at the same time in decimal, binary, hex, and octal, updating together as it changes. Why it matters: most learners study these number systems one at a time and never see how they actually relate to each other in real time — watching them all move together makes the connection between bases click in a way a static conversion table never does. How to use it: adjust the value or let it animate, and watch how each number system represents the same underlying quantity differently.

How to use this tool

The odometer shows the same number at the same time in up to four number systems: decimal, binary, hex, and octal.

Use the controls to step or animate the value and watch how each base represents the same underlying quantity differently.

  • Play/Pause — animate continuously
  • ← → — step one at a time
  • Reset (↺) — return to zero
  • Speed — drag to control animation rate
  • Keyboard: arrow keys step, space bar plays/pauses, R resets

What you'll learn

Aligned to

CompTIA Tech+
1.2 Identify notational systems.

Key terms

Binary
The base-2 number system that uses only the digits 0 and 1; the native language of digital computers, which store and process data as electrical on/off states.
Decimal
The base-10 number system using digits 0–9; the standard system used in everyday counting and arithmetic, and the most common format for presenting numeric output to humans.
Hexadecimal
Hex
A base-16 number system using digits 0–9 and letters A–F; each hex digit maps to exactly 4 bits, making it a compact shorthand for representing binary data.
Octal
A base-8 number system using digits 0 through 7, where each digit represents exactly three binary bits; commonly used in Unix and Linux file permission notation because a three-bit permission group (read, write, execute) maps cleanly to a single octal digit.
Place Value
The weight assigned to a digit based on its position within a number; in binary, each position represents a successive power of 2 (1, 2, 4, 8, …), making position the key to decoding binary values.

Topics

Number Systems Binary Hexadecimal Decimal Octal Data Representation

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