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TechKnowSurge Catalog Interactives Hex Place Values
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Hex Place Values

Watch how hex numbers are built one column at a time, with each place-value column showing 0–15 blocks that fill and carry.

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

About this interactive

What you're seeing: a step-by-step walkthrough that builds a hexadecimal number one column at a time, showing each place-value column as a 0-15 block grid alongside the running decimal and hex total. Why it matters: hex is just counting in base 16 — seeing each column's 0-F range rendered as fillable blocks, with the carry from F back to 0 made visible, is how the place-value trick behind hex-to-decimal conversion actually clicks. How to use it: step forward through every value in order for a guided walkthrough, then once you reach the top of the range, click any column directly to cycle its digit 0-F and explore freely.

How to use this tool

Two columns: the 16s place and the 1s place (0–FF). Each column is worth sixteen times the column to its right and holds a digit from 0 to F.

Step forward and back with the arrows to walk every value in order, or click either column to cycle its digit up by one (wrapping F back to 0). Watch each column's block grid fill or empty and the decimal/hex total update.

What you'll learn

Aligned to

CompTIA Tech+
1.2 Identify notational systems.

Key terms

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.
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.
Nibble
A group of exactly 4 bits, equivalent to one hexadecimal digit; two nibbles make up one byte.
Carry
In binary addition, the value of 1 passed to the next higher bit position when a column's sum exceeds the maximum value representable by a single bit.

Topics

Hexadecimal Hex Place Value Number Systems Base 16 Data Representation

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