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

O T T F F S S ?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

John was piloting a plane behind a car but was never able to overtake it. Why?

Buy me, smell me or deliver me, I do not change.

Who am I?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?

Why is the Hole below a Lock?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

The centre of the third figure is empty. What digit should fit inside?