What is common among 11, 69, and 88?

In the picture given below, can you find out which digit will take place of the question mark?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Why is 6 afraid of 7?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What Deficiency does the below rebus represent?

VIT_MIN

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.