16. well it's pretty simple
Lets look at our earlier equation
1100
+ 1110
=11010
it's like normal addition
So lets see a normal addition question
15
+ 16
=31
in this question we first find "5 + 6" and realize it equals 11, so we then move the next digit and say "1 + 1" which equals 2, but we carry the 1 from "11" so that ie equals 3, eventually equaling 31
so we do the same in binary digits
1100
+ 1110
First digit on the right is 0 + 0 = 0 so first digit (on the right) is 0
Second digit is 1 + 0 which equals 1, so second digit is 1
Third digit is equals to 1 + 1 which equals 2, but there isn't a 2 in binary so we say it equals 10. So we carry the "1" and make the third digit equal to 0
Fourth digit is 1 + 1 which, as seen from above is 10, but we also have to add that one we carried, so we say it's equal to 11, so the fourth digit is 1 and the fifth digit is 1
11010