When can we add 2 to 11 and get 1 as the correct answer?

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?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Readers with the eyes of a hunter can find the snake in the field. Can you? Test your puzzle-solving skills now!

What has a ring but no finger?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Can you replace the question mark with the correct number?

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?