The more it dries, the wetter it becomes. Can you tell what it is?

What can you see in the middle of March and April that you can never see in any other month?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What's the best place to go shopping in the ocean?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Next Number in the Series,

5, 16, 49, 104, ?