Be active and find the killer in the picture Riddle below.

What brings you down but never up?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

What has no start, end, or centre?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Move three sticks of the spiral below to form a square.

Bay of Bengal is in which state?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?