Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

If you say my name, I will no longer exist. What am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

What has 88 keys?

Move three sticks of the spiral below to form a square.

Can you place three balls such that the equation shown in the picture holds true?

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?