Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Where do fish keep their money?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

There is something which is always coming but never arrives?

What is the longest word in the dictionary?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

What goes up but never comes down?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Find out the number of circles in the given picture having Illusion

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.