A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

How can one talk without saying a single word?

What do you see in the image below

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?