By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

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?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A donkey is behind another donkey
I'm behind that second donkey
But there is a whole nation behind me

It is a murder you can describe in a word.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?