Binary to denary and opposasite

What 0100 to denary
8
4
23
100
What is 23 in binary
11111
10111
10101
10000
31 to binary
11111
10000
10011
10101
100111 to denary
38
37
40
39
101010 to denary
42
43
50
51
13 to binary?
001101
111110
101011
100011
64 to binary
01000000
11111111
1+1+1=?
1 carry 1
0 carry 1
0 carry 2
Whats the binary 9?
1001
1100
11111111
What is the denary for 11111111
255
230
210
222
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