How is the moon similar to a dollar?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

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

What goes up but never comes down?

When does a USA Potato change its nationality?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?