A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

When 99 is considered higher than 100?

What is full of holes but still holds water?

How can you make number one disappear by adding something to it?

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.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Rearrange the letters in "new door" to make one word.

Can you find the hidden animal in the picture below?

Can you make a six-letter word using the letters N, A and B ?