I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

With the help clues provided in the image, can you find the 5 digit key?

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

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?

Which is the rope you never skip with?

Identify the hidden meaning behind this picture?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

What does this rebus puzzle means ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?