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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I have an eye but still cannot see.

Who am I?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

Can you write down eight eights so that they add up to one thousand?

What jumps when it walks and sits when it stands?

Can you solve the equation by finding the value of
A) Horse
B) Cowboy boot
C) Horseshoe

In the Picture?

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?

Solve the following series:
AZ, GT, MN, __, YB

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?