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

What occurs twice in a week, once in a year but never in a day?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

With the help clues provided in the image, can you find the 5 digit key?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

If two's company, and three's a crowd, then whats four and five ?

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?