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

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

When we see 2 but call 10?

How many times can you subtract the number two from the number fifty?

What can go through glass without breaking it?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?