Replace the question mark with the correct number in the below-given picture?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

If six children and two dogs were under an umbrella, how come none of them got wet?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

Which is faster, Heat or Cold ? Explain.

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99