1 + 1 + 1 + 1 + 1 90% Fail | this question was asked in an interview in google. only 2 guys could answer correctly

1 + 1 + 1 +1 + 1
1 + 1 + 1 + 1 + 1
1 + 1 x 0 + 1 = ?

Answer:

1 + 1 + 1 + 1 + 11 + 1 + 1 + 1 + 11 + 1 x 0 + 1

i.e. 4 + 11 + 3 + 11 + 0 + 1 = 30