Question

what is the value of 111 in binary system with base 10

Answer 1

You asked for 111 to be converted to base 10 notation.

Each 0 or 1 in a binary number corresponds to a power of 2 depending on its position.
For the number you entered, i.e. 111 this means the 0s and 1s correspond to the following powers of two:binary number111Power of 2210

The base 10 notation is then generated as follows.
(x^y means x to the yth power)

111 -> 1 x 2^2 + 1 x 2^1 + 1 x 2^0 = 7,
or 
111 -> 1 x 4 + 1 x 2 + 1 x 1 = 7,
or 
111 -> 7

111 (base 2) converted to base 10 is therefore: 7


HOPE SO HELPS U
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Answer 2

the base of binary is 10