What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you name some countries which do not have the alphabet 'A' in them?

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?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

How is a fly different from a mosquito?

I am sure no one can have two things for dinner. what are they?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

I make two people out of one. What am I?

Which wheel of car does not rotate when you turn your car right?

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