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gavinksong

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Everything posted by gavinksong

  1. There are actually several solutions, so feel free to tackle the problem your way.
  2. Ok, ok. You win. You're too good.
  3. Wow. That was quite short-lived. Good job! How about these: rosc radid ltiq ogwo rolys sepl
  4. I just invented this word game. The first player tells the second player part of a word, and then the second player has to guess the full word. The second player wins if they can think of any word that contains the word part. For example, "eard" is part of the word "beard". I played a few rounds with my brother. Here were some of our word parts: ecalc airb rinci tibac uidel gorit igna eyho See if you can solve any of them. Also, feel free to post some of your own parts of words on this thread, so that others can try them.
  5. bumpitybump Don't let the title scare you. It is not really that complicated.
  6. Feel free to solve this puzzle.
  7. Yup. The last paragraph is a bit of a dead giveaway, but there are other more subtle hints scattered throughout.
  8. That's not such a bad guess, but there's a better answer that fits the rest of the clues.
  9. You're right, bonanova. I should've known: my solution did seem a bit complicated. :S
  10. The excerpt is about a plant. You must determine which plant it is.
  11. A long leafless stalk bends slightly, from the weight of a star, sitting bright and yellow on its crown. She likes to sit alone sometimes, at its feet, suspended on a lobe springing from its leafy rosette. Today, she has a book about stars. She likes the creakiness of it. It makes a nice sound when she turns the pages. It reminded her of the old mahogany stairs at her grandma's house. She turns another page. It has a picture of another star, called Lambda Leonis. She often looked up at the one above her and wondered where it went at night. But now she knew it was still there, just hiding. One day, she learned, it would shrivel up and die - except it wouldn't be dead. It would shrink to a bulb the size of her fist, and then suddenly, it would burst out like a white firework, and all the little pieces would fly out and make other little stars, somewhere else, very far away. ---------------- I wrote this puzzle for my girlfriend this morning. She likes stories and plants, but doesn't like puzzles. :\
  12. This puzzle is admittedly quite hard, so here is another hint.
  13. That's a technique called 'fast exponentiation', and it can be used later on in the problem to evaluate a matrix exponentiation. However, I'm not sure it would speed up your operation quite fast enough. If you've computed 1000 digits, you're already using several megabytes to store a single value, all of which needs to be processed at least 31 times for a result that may or may not be correct. No, the answer is to bypass calculating the value of √5 completely. It's a math problem, not a coding problem. I've never seen even-odd testing done like that before btw. Is it faster than using the remainder operator? Edit -- of course, what I said above is just conjecture. I actually don't know how long it would take at all, but it probably still won't work for n = 2 billion.
  14. I am surprised that this was not meant to be a riddle but an actual question. I won't try to compete with plasmid or bonanova's fairly comprehensive answers, but here's the simple reasoning behind my initial guess.
  15. Actually, that's not quite true as 1 is also a positive integer divisor. Composite really just means "not prime".
  16. Um... Is this your answer for some value of n? Do you have a general method?
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