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?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

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?

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

Can you write down eight eights so that they add up to one thousand?