Using Only Five 5's and any mathematical operator make sum as 37

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Count the squares in the matchstick puzzle below?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

I don't get anymore wetter, no matter how much rain falls on me.

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

Can you find out the number that should replace the question mark with a valid reason?