Can you replace the question mark with the correct number in the below table sequence?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Solve the mathematical equation in the picture below.

How far can you walk into the woods?

Which is faster, Heat or Cold ? Explain.

Can you find out the missing number in the grid?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?