It is the same number: 1.
Binary numbers are base-2, with each digit place corresponding to an exponent of 2 rather than 10 in the decimal number system.
So that the number 11, which in decimal means 10 + 1, would represent 2 + 1 (3) in the binary system, which can only have the value 0 or 1 in each digit place.
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When written as a binary number, the decimal number 63 is: 1 1 1 1 1 1
The number 7 - written in binary is... 111
Every decimal number can be represented by a binary number - and conversely.
The binary number 11 represents (1 x 2) + ( 1 x 1) which equals 3.
Decimal 11 = binary 1011