Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

What is the next number in the series?

15 29 56 108 208 ?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

What has many keys but can’t open a single lock?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

I’m tall when I’m young, and I’m short when I’m old. What am I?