There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you find out which number multiplied by itself will give the output as 12345678987654321?

In an office's desk, you find a unique method that shows the current day of the month. Two numbered cubes are used to depict the current date.

Can you find out the numbers on both the cubes so that each date can be mentioned using them?

Please note that you have to use both the cubes to display any date. Thus the 1st day must be represented by 01 and so on.

What does below chemistry rebus means?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

What kind of band never plays music?

The answer I give is yes, but what I mean is no. What was the question?