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Q: How many different values can be represented by 2 hexadecimal digits?

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64 or 123

Each hexadecimal digit represents four binary digits (bits) (also called a "nibble"), and the primary use of hexadecimal notation is as a human-friendly representation of values in computing and digital electronics. For example, binary coded byte values can range from 0 to 255 (decimal) but may be more conveniently represented as two hexadecimal digits in the range 00 through FF. Hexadecimal is also commonly used to represent computer memory adresses.

4 these are 00,01,10 and 11...

These are used quite often to represent values stored in bytes - 1 byte is represented as two hexadecimal digits. For example, both the MAC address of a network card and the new IP addresses (IPv6) are usually shown as hexadecimal.

These digits can be represented based on their Place Value Notation.

A hexadecimal colour code is a six-digit code where the code for any particular colour the RGB values, each represented by a 2-digit code as follows:the first two digits represent the hexadecimal code for the red colour type,the second two digits represent the hexadecimal code for the green colour type, andthe third two digits represent the hexadecimal code for the blue colour type.In each case, these codes include leading zeros, so that they are two digit codes in the range [00, FF]. This allows 256 different values for each colour type making 16,777,216 colours in all.

A hexadecimal digit can store 16 different values, which requires 4 bits or 1/2 byte. Since we often can't split bytes in half, this would be rounded up to 1 byte to store 2 hexadecimal digits.

Hexadecimal colour codes are codes comprising six hexadecimal digits in whichthe first two digits represent the red colour typethe middle two digits represent the green colour typethe last two digits represent the blue colour typeSince two hexadecimal digits give 256 values, the 6 digit code can represent 16,777,216 colours.

Hexadecimal is simply short-hand for binary numbers. Because hexadecimal is base 16 or 24 , every 4 binary bits can be expressed as a single hexadecimal character. For example, 1110 is E in hexadecimal and 1111 0011 1000 1010 is written as F38A in hexadecimal. Writing memory addresses, binary code, or IP addresses in hexadecimal results in number which has 75% less characters. The hexadecimal system uses sixteen distinct symbols, most often the symbols 0-9 to represent values zero to nine, and A, B, C, D, E, F to represent values ten to fifteen. When dealing with large values the hexadecimal system solves this problem and it is simple to convert a hex digits into a binary digits.

With 6 binary digits, you have 26 different possibilities. This is because there are two possibilities for each digit, and each digit is independent of the other digits - so you just multiply the possibilities for each digit together.

The different digits have different values.

A hexadecimal colour code is a six-digit code wherethe first two digits represent the hexadecimal code for the red colour type,the second two digits represent the hexadecimal code for the green colour type, andthe third two digits represent the hexadecimal code for the blue colour type.In each case, these codes include leading zeros, so that they are two digit codes in the range [00, FF]. This allows 256 different values for each colour type making 16,777,216 colours in all.

24, or 16 (0 through 15) One binary digit (bit) can have 21 values (0 or 1). Two bits can have 22 values. Three bits can have 23 values. A five-bit number can have 25 values... and so on...

MAC (Medium Access Control) addresses, part of the 802 family of IEEE standards, have 48 bits. They are typically represented as six pairs of hexadecimal digits, eg: 00-11-22-DD-EE-FF (each digit is comprised of the hexadecimal digits 0-9 and A-F, from 0 to 15 decimal). Each hexadecimal digit is 4 bits in length, so the pair is 8 bits. Thus, the pair of numbers can represent decimal values from 0 to 255. In some notations, the "-" is replaced with ":", eg 00:11:22:DD:EE:FF. The pair of digits can also be referred to as an octet or a byte.

4 bits equal to half byte.8 bits is one byte.when converting hexadecimal digits to binary, each hexadecimal digits will take 4 binary digits, which means 4 bits.Because one binary digit means one bit having two values [true/false] or [on/off] like that.. [0/1]we can represent one hexadecimal digit as 4 bits like..for [7] as hexadecimal, we can say [0111] in bits.

The two sets of digits have different place values.

Each hexadecimal digit can hold one of 16 values (0-F); 16 = 2^4, so exactly 4 bits (binary digits) can hold the same value as 1 hexadecimal digit. As a result the conversion from binary to hexadecimal is simply a matter of grouping the bits together in blocks of 4 (making nybbles) and converting each block into a single hexadecimal digit. Similarly for binary to octal but in this case as 8 = 2³ the bits are group into blocks of 3 which are then converted into octal digits. However, converting decimal to hexadecimal is not so "easy" as each decimal digit does not map to an exact number of binary digits. The only exception would be when using BCD (Binary Coded Decimal) where only the bit patterns for the decimal digits 0-9 are used in every 4 bits (wasting 6 possible digits) and where 0000 1001 (09) + 0000 0001 (01) = 0001 0000 (10). In this case the hexadecimal representation of the BCD is exactly the same as the decimal, but I have never seen it used as such (beyond the binary representation).

The number 249 in hexadecimal would be F9. The digits in base 16 correspond to powers of 16 rather than 10. For a two-digit number, the place values are 16 and 1, and the usable values are from 0 to 15, with values 10 through 15 represented by letters A (10) through F (15). F9 = (15x16) + (9x1) = 240 + 9

32 values. 2^5=32

Internally, the computer processes bits - ones and zeroes. Hexadecimal is a shorthand form of writing those values, or of showing them to humans - every hexadecimal digit corresponds to four bits. Conversion from binary to hexadecimal is fairly easy; converstion between binary and decimal is more complicated.

Any base that is itself a power of 2 can be used to notate binary values. That is, base-4, base-8 (octal), base-16 (hexadecimal), base-32, and so on. Binary is a base-2 counting system such that each digit represents one of two possible values (0 or 1). When we combine bits we double the number of possible values with each additional bit. Thus 2 bits can represent up to 4 possible values, 3 bits gives us 8 possible values and 4 bits gives us 16 possible values, and so on. We normally deal with bits in groups of 4 because 2 groups of 4 gives us an 8-bit byte which is the norm for most systems. Thus we can reduce an 8-bit binary value from 8 binary digits to just 2 hexadecimal digits, thus giving us a convenient method of notating binary values with fewer digits and a trivial conversion. Octal notation isn't used as much as hexadecimal notation, but if we wanted to use a 9-bit byte rather than an 8-bit byte (which is not an uncommon activity), octal notation is more convenient than hexadecimal because the 9-bit values can be treated as being exactly 3 groups of 3 bits.

god knows

2^12=4096

Degital means of a clock or watch showing the time displayed on the digits rather then the hands or a pointer, expressed as a series of the digits 0 and 1, typically represented by values of a physical quantity such as voltage or magnetic polarization.

Mutilply the values of the digits.