By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

In a certain bank, a man deposits a certain amount. According to the bank policies, the amount will be doubled up in a year but as the service charge, they will also deduct Rs. 65 by the end of every year.

If after the 6th year, the amount becomes 0, what do you think is the original amount he deposited in the bank?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I have teeth but i don't bite. Who Am I ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What is harder to catch the faster you run?

What can go up a chimney down, but can’t go down a chimney up?

Can you identify if it's a murder or a suicide ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?