Which base uses digits 0-9 and A-F?

Which base uses digits 0-9 and A-F?

• A. Binary Number System
• B. Hexadecimal Number System
• C. Decimal Number System
• D. Octal Number System

Answer: (B)

Digits 0-9 and A-F indicate hexadecimal, a base-16 numeral system. In hex each digit can represent 16 different values: 0 through 9 are the same as in decimal, and the letters A through F stand for the decimal values 10 through 15. Because the base is 16, each position represents a power of sixteen. For example, the hex number 2A3 equals 2*(16^2) + 10*(16^1) + 3*(16^0) = 527 in decimal. This compact representation is handy in computing because each hex digit maps neatly to four binary bits, making it easier to read binary data. Binary uses only 0 and 1, decimal uses 0-9, and octal uses 0-7, which is why only hex uses 0-9 plus A-F.

Digits 0-9 and A-F indicate hexadecimal, a base-16 numeral system. In hex each digit can represent 16 different values: 0 through 9 are the same as in decimal, and the letters A through F stand for the decimal values 10 through 15. Because the base is 16, each position represents a power of sixteen. For example, the hex number 2A3 equals 2*(16^2) + 10*(16^1) + 3*(16^0) = 527 in decimal. This compact representation is handy in computing because each hex digit maps neatly to four binary bits, making it easier to read binary data. Binary uses only 0 and 1, decimal uses 0-9, and octal uses 0-7, which is why only hex uses 0-9 plus A-F.