Memory & StorageKey Facts

Denary to Hexadecimal Conversion

Part of Binary & Hex — GCSE Computer Science

This key facts covers Denary to Hexadecimal Conversion within Binary & Hex for GCSE Computer Science. Revise Binary & Hex in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 22 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 9 of 14 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 9 of 14

Practice

15 questions

Recall

22 flashcards

Denary to Hexadecimal Conversion

Method: Repeated Division by 16

Example: Convert 195 to hexadecimal

  195 ÷ 16 = 12 remainder 3
   12 ÷ 16 = 0  remainder 12 (C in hex)
  
  Read from bottom to top: C3
  Answer: 195 (denary) = C3 (hex)
  
  Check: (12 × 16) + 3 = 192 + 3 = 195 ✓

Example 2: Convert 255 to hexadecimal

  255 ÷ 16 = 15 remainder 15
   15 ÷ 16 = 0  remainder 15
  
  15 in hex = F, so: FF
  Answer: 255 (denary) = FF (hex)

Practice Questions for Binary & Hex

Which of the following correctly describes the hexadecimal number system?

A. Base 2, using digits 0 and 1
B. Base 8, using digits 0 to 7
C. Base 16, using digits 0-9 and letters A-F
D. Base 16, using digits 0-9 and letters A-G

1 markfoundation

Explain why hexadecimal is used instead of binary when programmers write memory addresses and colour codes. Give three reasons.

3 marksstandard

Denary to Hexadecimal Conversion

Denary to Hexadecimal Conversion

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