Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

O T T F F S S ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you solve the below geography rebus by decoding the below rebus ?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Solve the counting riddle by identifying the number of triangles in the given picture.

What brings you down but never up?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?