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.

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

What is the difference between a jeweller and a jailer?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Replace the question mark with the correct number below.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Imagine you are in a room with no windows or doors. How will you get out?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

What is more useful when it is broken?

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