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 ?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

I am white when I am dirty, and black when I am clean. What am I?

Solve the following series:
AZ, GT, MN, __, YB

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Find the next number in the series below

21 32 54 87 131 ?

How can you tell a raw egg from a hard-boiled egg?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?