Best riddles for teens

A boy fell off a 30 meter ladder but did not get hurt. Why not?

Why was Karl Marx buried at Highgate Cemetery in London?

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?

One day a boss said to her employees, "I can fight and beat any man who works here." A new employee, a seven-foot-tall ex-prize fighter, stood up to take on the boss. The boss kept her word, but did not beat the man or back down. What did the boss do?

Dipping, glinting, gliding by, Rainbow-fretted, wrought of breath. I live only while I fly – Earth’s rough kiss my sudden death.

A little pool with two layers of wall around it. One white and soft and the other dark and hard, amidst a light brown grassy lawn with an outline of a green grass. What am I?

You measure my life in hours and I serve you by expiring. I'm quick when I'm thin and slow when I'm fat. The wind is my enemy.

This is a piece of jewelry Most often worn by girls It's sometimes gold or silver And sometimes made of pearls What is it?

You have two cups. One cup is filled with black coffee and another cup is filled with black tea. Both cups are filled with equal quantity of respective beverages. Take one spoonful of black tea and mix with the cup of black coffee. Then take one spoonful of black coffee and mix it with the cup of black tea. Now tell, me which cup has more liquid in it? Does the cup of black tea has more liquid or black coffee has more liquid?

A man worked for a high-security institution, and one day he went in to work only to find that he could not log in to his computer terminal. His password wouldn't work. Then he remembered that the passwords are reset every month for security purposes. So he went to his boss and they had this conversation: Man: "Hey boss, my password is out of date." Boss: "Yes, that's right. The password is different, but if you listen carefully you should be able to figure out the new one: It has the same amount of letters as your old password, but only four of the letters are the same." Man: "Thanks boss." With that, he went and correctly logged into his station. What was the new password? BONUS: What was his old password? HINT: It is nine letters long. Also, a "password" can be more than one word...