Solution:

Turn the grid upside down. Circle the numbers 1, 9, 1, 1 When you flip it upside down the 6 becomes 9

Solution:

Concrete floors are very hard to crack

Solution:

Move the 6 up just a little bit.
2pow(6) -63 =1

Solution:

Silence

Solution:

F

Explanation: The letters are the first letter of each of the twelve months. The second month is February.

Solution:

fsh

no eye => no i
=> fish -i
=> fsh

lolz

Solution:

Just once, because after you subtract anything from it, it's not 100 anymore.

Solution:

Because, people turn them on.

Solution:

Neither, the accountant was his sister.

Solution:

Barber