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

Buy me, smell me or deliver me, I do not change.

Who am I?

I shave every day, but my beard stays the same. What am I?

Can you count the number of quadrilaterals in the picture below?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Can you find the key in the picture below?

Why Aeroplane windows are round?

What do you call a fish without an eye?