16 = 24 so 162 = 10000
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A.N.D. Leibniz defined the binary number system.
A binary system is a special type of a number system. The binary system uses only two digits, other number systems use more.
There are two digits in the binary number system. 0 and 1
With the first number being 1 (not zero), the 25th number is 11001 (base 2). This is 16 + 8 + 1 = 25 (in base ten). Each place value in the binary system is double the value to the right of it.
There is no decimal number for the binary number 13 because 13 cannot be a binary number.