What does the below mathematical rebus mean?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

What do you get if you add 2 to 100 four times?