What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Can you find a five letter word that is left with only two letters if one is removed?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Can you count the number of lines in the below picture?

I am quite hot but become too cold if you remove the first two letters. What am I?

What is the next number in the series?

15 29 56 108 208 ?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98