10010102 = (in base 10) 26 + 23 + 21 = 64 + 8 + 2 = 74
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1024 = 10000000000
Converted from decimal to binary, 123789 is equal to 11110001110001101.
I assume that you are asking how to convert the binary: 011110 to decimal. First off there are 6 places in this binary number--actually five, being that the last number is 0 (a place-holder). So, charting or making a table: Binary CalculationDecimal EquivalentOriginal Binary NumberAdd together2010021212224142381824161162532002664Not givenNot given Add together the last column of numbers together will give you the decimal equivalent to the binary number: 011110.
The number 21 in binary is 10101
In binary this would be written as 1010. This is because in binary (from right to left) the digits in this number mean:(0 * 20) + (1 * 21) + (0 * 22) + (1 * 23).This is equal to (0 * 1) + (1 * 2) + (0 * 4) + (1 * 8), which equals 0 + 2 + 0 + 8, which equals 11 (in decimal).