BrainDen.com - Brain Teasers

# bonanova

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1. ## Why we're all in debt

@plasmid was discussing finances with his planner the other day. After they reviewed tax returns and year's worth of receipts, the advice he received was just this: S P E N D - L E S S ========= M O N E Y You's think so, he replied, but I've determined that this is quite impossible. Is he right?

I understand that the mouse goes to the nearest crumb, and that "nearest" means shortest euclidean (straight line) distance. So (haven't read the spoiler yet) I never conceived the mouse would get advantage by doing otherwise. I'm assuming the mouse is playing strictly according to his own hunger advantage. Am I right about that? Oh wait. you're saying that Give me a day or two to work on that?

@CaptainEd @plasmid

@plasmid Interesting puzzle and thanks for the call out. EDIT: Thought this was optimal, but now have read @CaptainEd's solution. Tip of the cap, Nice going. FWIW, my best efforts follow .... Breadcrumbs (red circles) are placed at the five vertices A B C D and E. Object is for our mouse to take four straight paths: AC, CE, EB, and BD. Because we have a greedy mouse that goes to the nearest snack, it will move from a vertex to an adjacent vertex whenever it has an uneaten crumb. That must be prevented. So we draw inter-vertex-radius circles -- a red circle centered on A, a green circle centered on C and a blue circle centered on E -- to help define advantageous areas to place our minimum (M) count of additional tasty crumbs to keep our mouse on its intended path. It is quickly evident that M can't be less than 5. (First-pass solution.) Second-pass solution.
5. ## Lunch Games

At lunch yesterday four students, Al, Bill, Jack and Tom (last names Conner, Morgan, Smith and Wells, in some order) amused themselves by dealing poker hands to all, with the winner being the holder of the best hand. The winner of the first hand was to collect 10 cents from the other three; the second-game winner would collect 20 cents each; the third winner get 30 cents each; and so on. When the bell rang for afternoon classes to begin, four hands had been dealt, with each student winning once, in this order: Jack, Morgan, Bill and Smith. At the outset Tom had the most money, but at the end Wells had the most. What are the students' full names?
6. ## Alphametic

OK these subtractions do not work using letters. But make a number substitution, the same for both, and everything's fine. N I N E N I N E - T E N - O N E ======= ======= T W O A L L
7. ## Alphabet baseball

The local Literary Society had just enough members to field two teams, and so they decided one Saturday in June to play a baseball game down at the park. After members were assigned to teams, aptly named the Prose and the Cons, they purposed to determine which team would be the home team in a sort-of literary manner. The 18 players formed a circle and began counting, clockwise, using the letters of the alphabet rather than numbers. It was decided that if the "count" ever got to "Z" the next player would continue by calling out "A" and so on. The process would continue until a player named the letter that was also his initial. That player would then gain the honor of having his team bat last. The captain of the Cons went first, calling out "A", the next player called "B", and so it went. Surprisingly, after 360 letters were called no player had called his initial. Well, said one, it was a nice thought, but hey let's just flip a coin, already. And thus the Prose were named home team. But by then it was dark, and the game was accordingly postponed until the following weekend. But when they gathered next to play, there was a disagreement about who was on which team, owing to the fact that no one had bothered to write the rosters down. No problem, though. All 18 members of the Lit Soc, Taylor, Brown, Jenkins, Miller, Gerson, Babcock, Adams, Randolph, Carver, Smith, Flynn, Sawyer, Timmons, Myers, Lucas, Morton, Young and Peters, were also long time members of BrainDen and thus had no difficulty at all in reconstructing the team rosters. And neither should you. Who played for each team?

Four men, Brown, Harris, Jones and Smith, were talking one day over drinks about their sons. Among the statements they made, some were true and others were false, owing to the fact the they didn't know their friends' sons all that well. The only thing we know for sure is that each statement in which the speaker mentions the name of his own son is reliably true. Brown: Al graduates from High School next month. Carl hasn't had a vacation since he started working two years ago. Bill's wife can't get him to take any kind of exercise. Harris: Bill is going to be married next spring. Dick has been dating my daughter. Al and Carl played on the freshman football team at college this year. Jones: Al will be nine tomorrow. Bill is younger than Al. Carl and Dick are returning from a hunting trip today. Smith: Bill and Jones won the Father and Son Handball Tournament. Dick told me yesterday that he hasn't seen Carl for a long time. Al and Carl were roommates at college last year. What is the full name of each boy?
9. ## Lying brothers

You know the drill. Generally they tell the truth, but sometimes they lie. For Bill the lying days are Monday, Tuesday and Wednesday. For his brother John, the lies are told on Tuesday, Thursday and Saturday. Recently the three of us had a chat: Me: Hi, what’s your name? Older brother: I’m Bill. Me: What day is it? Older brother: Yesterday was Sunday. Younger brother: And tomorrow is Friday. Me: Wait. That doesn’t add up. Are you sure you’re telling me the truth? Younger brother: I always tell the truth on Wednesdays What day was it, and what is the name of each boy?
10. ## Matching cards

@Thalia and @MikeD, two good approaches, same right answer. Kudos.
11. ## International Football Team

Yes, we conquered it as a team effort. RDM, very nice puzzle.
12. ## International Football Team

One more try ...
13. ## Matching cards

Clue: Big clue:

16. ## Matching cards

A deck of cards is shuffled and dealt face up in a single row. A second deck is shuffled and dealt face up in a single row beneath the first row, making 52 coloumns each containing two cards. On average, how many pairs of cards will match?
17. ## Singular plurals

Well done @Wilson! @Thalia apologies that checking @Wilson's answer inadvertantly unchecked your solution. A shortcoming of the site. But both posts have their upvotesl
18. ## Finally the AG he needs ...

Attorney General Barr was seen in Washington yesterday wearing a custom made cap with the initials M.A.G.A. For his cap they meant Make Allegations Go Away.
19. ## Walking, running, driving, waiting

I'll accept it but I was thinking more like ....
20. ## Walking, running, driving, waiting

With a tip of the hat to @BMAD for his interesting puzzle. For your amusement, here's an interesting spin on this genre: One night you encounter a two-hour traffic delay due to an accident (the tow truck had difficulty clearing the road.) So, for a time interval 13 of two hours you were constrained to travel at 0 mph. You called home and said, sorry dear, but I'll be two hours late getting home. The next night, for some unimaginable reason, you were also constrained to travel part of the way at 0 mph, this time for a distance of one inch. What do you say now when you call home?
21. ## Singular plurals

I'll answer both in the clear. No. (although the words I have in mind, one plural, one singular, are closely related) No. It's the literal removal of an "s". Kudos. But not the words I had in mind. They are common words, and they are closely related.
22. ## The liar, the truth teller....and the random answerer

@Jaspreet Singh greetings and welcome to the Den. 2007 really? Twelve years ago? This puzzle is a time capsule.
23. ## Fair division of sausages

Appears to be ...
24. ## Easy Root

The solutions are Because Cute.
25. ## Question

Not in every case. You could be kept alive from nourishment by other means. An intravenous tube, for example. So there is hope, and you can smile once again.
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