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?

If an electric train is travelling south, then which way is the smoke going?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

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

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

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.