Which number system uses 16 distinct symbols: 0-9 and A-F?

Which number system uses 16 distinct symbols: 0-9 and A-F?

• A. Lossless
• B. RGB
• C. Image
• D. Hexadecimal Number System

Answer: (D)

Hexadecimal is the numeral system that uses 16 distinct symbols, 0 through 9 and A through F. Each digit represents a value from 0 to 15, with A=10, B=11, C=12, D=13, E=14, and F=15. Because computers operate on binary, hex is convenient since each hex digit maps to four binary bits, making it easy to read long binary values. For example, the hex number 2A3F corresponds to binary 0010 1010 0011 1111 and equals decimal 10815. The other terms shown aren’t number systems: one is a color model used to describe digital colors (RGB), another is a type of image file, and another describes a data compression property.

Hexadecimal is the numeral system that uses 16 distinct symbols, 0 through 9 and A through F. Each digit represents a value from 0 to 15, with A=10, B=11, C=12, D=13, E=14, and F=15. Because computers operate on binary, hex is convenient since each hex digit maps to four binary bits, making it easy to read long binary values. For example, the hex number 2A3F corresponds to binary 0010 1010 0011 1111 and equals decimal 10815. The other terms shown aren’t number systems: one is a color model used to describe digital colors (RGB), another is a type of image file, and another describes a data compression property.