An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

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

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

What is the riddle which can be asked all day with a different correct answer each time.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

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?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?