Need suggestions: How to challenge your mind only using your mind ?!

Make it past 800 there. I dare you. Notable milestones include 59 (digital root 14, again at 68, 77 etc), again around 399 (digital root 21, then 489... stay sharp!) and of course 700-800 is the period of much cursing.

And of course remember your squares and cubes. There is a tendency to forget checking those.

This game is also good played against somebody else, alternating turns.

 

In other news, anagrams are another way to kill time. This is again best played against somebody (challenge each other with scrambled words.) Since I've played a little against my friends, here's a sampler of puzzles, rearrange each to form unrelated English words (British spelling where applicable):

tumerise, citrus [yes form another word], ethanoic [difficult], icarves, agileslob, maldeer, nouget [not a typo].

Search for puzzles in your spare time, or even in your native language!

Holy heck that is fast. "Inchoate" is the word you missed, and it is pretty obscure. As you can tell, I don't play scrabble a lot. ;-)

1. Walk around the airport. Enjoy the view you see from the windows. Hear the birds chirping. Enjoy life. Do this for the first 5 minutes or so before you grab the fire hydrant, smash the window with it, and jump out headfirst. Then, let the people take you to the regular hospital and then the mental hospital. It'll really kill time because you're in serious pain so that's all you're really thinking about.

2. SMILE SMILE SMILE. Go around the airport to all the children and give the biggest (teeth-showing) smile you can and say, "I love you".

3. Go find some girl in her teens and say to her,"Hi I'm your son... FROM THE FUTURE!!!!"

4. Go to a group of talking people, stand about 5 feet away from them, and hum as loudly as you can.

Note: The suggestions posted above are for people whose sanity levels are a little over the charts. Please do NOT attempt to do any of these if you are perfectly sane. Thank you for your cooperation.

any more ideas? 

Clearing your mind is an exercise I would recommend 

thats not the point. The point is to figure out if you can gamble with yourself in any field (game or whatever) in your imagination. Imagine you are blind, full paralyzed, mute and deaf. But your mind is OK and you have to spend years in your imagination. To entertain yourself you would play a game which you could visualize and play in your imagination. Any idea of what kind of game could it be??

it can be a numeric  game, word game, or whatever.. whats the sickest idea that comes to your mind?

easy: chess. 

Oh, sickest idea? Naked chess. 

only?

I would have stopped the thread after #2 post. Gomez has the best idea. 

Gomer, not gomez

1. There is usually a terrace where you can see the planes take off. a) Go there and strike wizard poses as to imply that your magic makes the planes fly. b) "Place" the person/thing you most hate in one of the planes and see it go away. c) Same, but now it's your ego. d) Everytime a plane takes off say, "Yes!". After a while, look devastated and say "No..."

2. a) Play Dungeons&Dragons in your mind. By the time of your flight you might have gone up a few levels. b) The same with a historical character. This would lead lo alternate history musings.

3. Create your own...a) urban legend. b) conspiracy theory. Spread it.

4. Improve your surroundings. For the things you can't fix, write a suggestion for the airport.

5. Watch films in your mind. Change characters, scenes, endings...

6. Think of your favorite book. Make a film in your mind about it.

7. Think of 10 things you would take to a deserted island. Now make it 9. Now 8...

8. Imagine there's a disaster and you can save all your friends but one. Who would that one be and why?

9. Rank your life experiences.

10. Play The Game.

Reading this forum is a challenge.

i am a mathematician , so i like to solve the hurdles in my current  research in my mind ( actually mathematicians can do this , they all have this ability - i actually see the calculations in my mind ) .