You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What is the next shape from answers A, B, C, and D figure?

Find the missing number in the sequence below:

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

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 ?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I