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?

Buy me, smell me or deliver me, I do not change.

Who am I?

What always comes into a house through the keyhole?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

You can hear me, but you can't touch or see me.

What am I?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

What has 88 keys?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?