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?

I am white when I am dirty, and black when I am clean. What am I?

Why Wine Glass Stem is so long?

How many triangles are there on the puzzle below?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

Can you find out who is the kidnapper in below Picture and why, Explain ?