4 + 2 + 1 ie 7
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7
It is 7.
As per the 8421 rule the given binary number can be solved as : 0 0 0 0 0 1 1 1 0 0 0 0 0 4 2 1 i.e : 4+2+1 = 7 So the answer is 07 in decimal for 00000111 in binary
The binary number 10101 represents 21.
In binary form it is 1010001.