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

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

What goes through cities and fields, but never moves?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Look at the picture and find out which square is not linked with any of the other squares.

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

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?