Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

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

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Forwards I am heavy, backward I am not. What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?