What does this Rebus Picture mean?

There are forty elephants and they have forty-fore heads. How can this be possible?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

By using 'because' continuously three times, can you make an English statement ?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

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

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.