Decimal to Hexadecimal — Division and Remainder Convert the decimal number 74 to its hexadecimal form, showing the division by 16 process or an equivalent mental shortcut.
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AA416
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BB416
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C4A16
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D4B16
Answer
Correct Answer: 4A16
Explanation
Introduction / Context:Decimal to hexadecimal conversion is frequent when interpreting addresses, constants, or color codes. The process uses repeated division by 16 and collecting remainders, or a quick decomposition into 16s and units if the number is small.
Given Data / Assumptions:
- Decimal input: 74.
- Hex digit values: 10→A, 11→B, ... 15→F.
- No sign and no fractional part.
Concept / Approach:Compute the quotient and remainder when dividing by 16. The quotient gives the high hex digit and the remainder gives the low hex digit. Alternatively, write 74 = 416 + 10 and map 10 to A directly.
Step-by-Step Solution:1) Perform division: 74 / 16 = 4 remainder 10.2) Map remainder 10 to hex A.3) High digit is 4 and low digit is A.4) Combine to get 4A base 16, written as 4A16.
Verification / Alternative check:Convert back: 4A16 = 416 + A = 64 + 10 = 74 decimal. The round trip confirms the value.
Why Other Options Are Wrong:
- A416 and B416: These represent 164 and 180 decimal respectively, not 74.
- 4B16: Equals 4*16 + 11 = 75, not 74.
Common Pitfalls:Forgetting that A denotes 10, misreading the remainder, or reversing the order of quotient and remainder when forming the hex digits.
Final Answer:4A16