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

How is the moon similar to a dollar?

Find the next number in the series below

21 32 54 87 131 ?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Why Aeroplane windows are round?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?