Replace the question mark with the number below given a simple math problem.

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

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

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you identify the hidden rebus in the image below?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?