Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

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?

What kind of storm is always in a rush?

You need to remove two matchsticks to make the below equation true. Can you do it ?

A bomb exploded in a room full of married couples and no one died. How?

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

If 21x = 79x, what is the value of x?