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

If an electric train is travelling south, then which way is the smoke going?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

As shown in the picture below, we can see a boy hanging on the tree branch to save his life. There are various ways in which he can die like1. A snake hanging toward the right waiting to bite the boy.2. A roaring Lion near the tree.3. Two crocodiles are ready to attack if the boy reaches near water. The tree is chopped to some extent, so can fall as if he moves a lot. Can you give this boy an escape plan?

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

How many times can you subtract the number two from the number fifty?