It would be 10100.
2010 = 101002
Decimal 20 is 10100 in binary
The decimal number "27" is written in binary as 11011.This is because binary has a base of 2. This means that the digits are representing multiples of powers of 2 (as opposed to 10 in decimal). This number in binary means (1 * 20) + (1 * 21) + (0 * 22) + (1 * 23) + (1 * 24). In decimal this equals 1 + 2 + 0 + 8 + 16. This, of course, equals 27.
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).
In binary this would be written as 1011. This is because in binary (from right to left) the digits in this number mean: (1 * 20) + (1 * 21) + (0 * 22) + (1 * 23). This, of course, is equal to (1 * 1) + (1 * 2) + (0 * 4) + (1 * 8), which equals 1 + 2 + 0 + 8, which equals 11 (in decimal).
The number 20 in binary is 10100
22 + 21 + 20 + 0 + 2-2 equals 7.25
1102 = 1*22 + 1*21 + 0*20 = 4 + 2 + 0 = 6
111101 to decimal = 25 + 24 + 23 + 22 + 01 + 20 = 32 + 16 + 8 + 4 + 0 + 1 = 61
26 + 25 + 24 + 23 + 20 = 64 + 32 + 16 + 8 + 1 = 121
10100
20 hex = 32 decimal or 100000 binary or 40 octal.