Decimal-to-hexadecimal conversion Convert the decimal number 457₁₀ to hexadecimal (base 16).

Difficulty: Easy

Correct Answer: 1C9

Explanation:


Introduction / Context:
Converting from decimal to hexadecimal can be done by repeated division by 16, recording remainders as hex digits (0–9, A–F).


Given Data / Assumptions:

  • Decimal number: 457.
  • Hex base: 16, digits A=10, B=11, C=12, D=13, E=14, F=15.


Concept / Approach:
Use successive division by 16 and collect remainders from last to first to form the hex representation.


Step-by-Step Solution:

1) 457 / 16 = 28 remainder 9 → least significant digit 9.2) 28 / 16 = 1 remainder 12 → next digit C.3) 1 / 16 = 0 remainder 1 → most significant digit 1.4) Combine MSB→LSB: 1 C 9 → 1C9₁₆.


Verification / Alternative check:
Compute back: 1*16^2 + C(12)*16 + 9 = 256 + 192 + 9 = 457.


Why Other Options Are Wrong:

  • 711/2C7/811: Do not evaluate to 457 when converted back.


Common Pitfalls:
Writing remainders in the wrong order or misreading C as 11 instead of 12.


Final Answer:
1C9

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