The Complex Challenge

I am not alive, but I grow; I don’t have lungs, but I need air; I don’t have a mouth, but water kills me. What am I?

Answer: Fire

The Riddle of Knowledge

What grows the more it is shared?

Answer: Knowledge

The Thought Experiment

What has a head and a tail but no body?

Answer: A coin

The Time Traveler’s Dilemma

A time traveler goes back in time and kills his grandfather before his father is conceived. What happens?

Answer: A logical paradox known as the grandfather paradox, where the time traveler's existence becomes impossible.

The Impossible Escape

You are trapped in a room with three doors. One leads to a room of blazing fire, one to a room with assassins with loaded guns, and the third to a room with lions that haven’t eaten in three years. Which door do you open?

Answer: The door with the lions, as lions that haven't eaten in three years would be dead.

The Invisible Traveler

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

Answer: A map

The Paradoxical Container

What can be broken, but is never held?

Answer: A promise

The Weightless Mystery

What is always coming but never arrives?

Answer: Tomorrow

The Unstoppable Force

What moves faster: heat or cold?

Answer: Heat, because you can catch a cold

The Magic Word

What 8-letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

Hint: Begin with words that have "ing" at the end.

Answer: Starting: "Starting", "Staring", "String", "Sting", "Sing", "Sin", "In", "I"