There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

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?

What Does this text mean:

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Why 1729 is a magic number? Answer Logically.

What came first, the chicken or the egg?

What you cannot hold but it is yours?

Which flower has two lips?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.