1000.
A binary number is a number expressed in base-2 numeral system, which uses only two digits: 0 and 1. When you say "of eight," it is unclear what you are referring to. If you are asking about the digit 8 in binary, it is represented as 1000.
For the decimal number system . . . 'Ten'. For the binary number system . . . 'Two' For the octal number system . . . 'Eight' For the hexidecimal number system . . . 'Sixteen' . . etc.
Binary means consisting of or relating to 2, especially any kind of system that has two of something. The 'binary system' often means the numerical system that consists only of 0 and 1, as opposed to the decimal system that uses 10 digits. But there are binary stars, two stars that orbit around each other, and the word is used in many other ways as well.
A binary number containing eight bits is referred to as one "Byte". A binary number containing four bits is referred to as one "Nibble".
1010 (eight plus two)
00010001
The number 143 in binary is the eight-digit number 10001111. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 10001111 = 128 + (0x64) + (0x32) + (0x16) + 8 + 4 + 2 + 1 = 143
The number 194 in binary is the eight-digit number 11000010. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 11000010 = 128 + 64 + (0x32) +(0x16) + (0x8) + (0x4) + 2 + (0x1) = 194
The number 136 in binary is the eight-digit number 10001000. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 10001000 = 128 + (0x64) + (0x32) +(0x16) + 8 + (0x4) + (0x2) + (0x1) = 136
The number 136 in binary is the eight-digit number 10001000. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 10001000 = 128 + (0x64) + (0x32) +(0x16) + 8 + (0x4) + (0x2) + (0x1) = 136
The number 189 in binary is the eight-digit number 10111101. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 10111101 = 128 + (0x64) + 32 +16 + 8 + 4 + (0x2) + 1 = 189
The number 200 in binary is the eight-digit number 11001000. The digits in a binary number are exponents of 2 rather than 10, so that for an eight-digit number in binary, the digit places represent 128, 64, 32, 16, 8, 4, 2, 1 instead of increasing values of 10. 11001000 = 128 + 64 + (0x32) +(0x16) + 8 + (0x4) + (0x2) + (0x1) = 200