What always comes into a house through the keyhole?

What does this Rebus Picture mean?

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.

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

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

Why do you find that most of the buildings are deprived of the 13th floor?

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 all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

What has 88 keys?