Identify the hidden meaning behind this picture?

What does this mean?

CCCCCCC

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Which is faster, Heat or Cold ? Explain.

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

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 man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?