BrainDen.com - Brain Teasers

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## Popular Content

Showing content with the highest reputation since 11/11/16 in all areas

1. 1 point

## Forgotten District II Mafia

Can I be the one to own you Molly? Or be owned by you? Please
2. 1 point

Player A has one more coin than player B. Both players throw all of their coins simultaneously and observe the number that come up heads. Assuming all the coins are fair, what is the probability that A obtains more heads than B?
3. 1 point

## Hard riddle

(BR / BL +UR) UL Thus... (8/4 +2) 3= 12 (2/1 + 6) 4= 32 (9/3 +4) 2= 14 and for the last one.. (6/2 +3) 5 = 30
4. 1 point

## Signups for Forgotten District II Mafia

On my phone, I see a link on each post that says "quote". I can sort of copy and paste the roster on phone but as I found out last game, the cursor had an unfortunate habit of moving... Spoilers and colors on phone have to be done with the [ ] codes. Spoiler: {spoiler}your text here{/spoiler} with [ ] instead of { }. No spoiler titles. Colors: {color=red/orange/whatever}text here{/color} also with [ ] instead of { }.
5. 1 point

## Signups for Forgotten District II Mafia

@MissKitten Tagging does not work on mobile and quoting is hard on mobile as well. But other than that, on a PC, one can copy-paste colors and not bother with quoting the roster altogether. Which is cool. At least from a host's PoV.
6. 1 point

## The Coup of Rhotus Mafia Signups

I think it's fair to say that the Coup of Rhotus is effectively dead for now; we're having enough trouble getting signups for a ten player game as is. Maybe once we build the player base a bit we can try to revive it, but for now I think it's rather unlikely. On the other hand, Forgotten Districts is in signups, and that's relatively close to getting off the ground!
7. 1 point

## Signups for Forgotten District II Mafia

Roster: 1. maurice 2. Flamebirde 3. Molly Mae 4. 5. 6. Hirkala 7. bonanova 8. 9. 10. Roster: 1. maurice 2. Flamebirde 3. Molly Mae 4. 5. 6. Hirkala 7. bonanova 8. 9. 10. Mafia!!! Been too long! I don't know if I was supposed to leave it doubled, but I did. Hi, everyone!
8. 1 point

9. 1 point

## UN Mafia III

If it makes you feel any better, I had you and Molly as Germany and Russia before the mass outing. Thought bonanova sort of claimed Australia earlier but figured if the US killed him I'd be better off whether he was Australia or China. He seemed like the biggest threat to me with his day actions. If maurice had removed a vote besides flamebirde's, it would have been a tie and I wouldn't have even got the chance to use my RID kill. When I was first reading through, I didn't realize you were expecting me to kill Molly. Got a bit of a laugh from that. So the biggest thing the mass outing accomplished was it made sure you got China. If you had lynched fb, I would have RID killed maurice which would have been blocking. I did get really lucky with bonanova getting the UK lynched D1 so thanks for that. On another note, I came extremely close to not acting at all N2 to try to frame plasmid as Sweden. Might have given mo's claim more credibility with neither Sweden nor China showing... So now that I know asking won't get me killed, what's a PGP public key block? And where were those soft claims?
10. 1 point

## UN Mafia III

Hey guys, sorry I'm here. Didn't realize I could talk when I was trapped and then I'm having issues accessing the site on my phone. I'm on through Firefox now and it works better than Chrome I guess. I will catch up at lunch and see what I can contribute, hopefully before the night ends in case I was mercy/mod killed.
11. 1 point

## UN Mafia III

@Thalia, good points. I've played only a few Mafia games. I wish I had accepted Unreality's invite to play, back in the day, and learned it better. Coupled with a hope for a few more games to follow this one. My comfort zone is math and logic, where all the needed info is provided, just needing insight and clear thought. This is more fun, actually, and with experience I might get better. Or, I'm a very slippery guy and everything I just said is garbage. . When does the night end?
12. 1 point

## UN Mafia III

@Thalia Understand, (with apologies to the players.) Hanlon's Razor. Seriously, what do we know about maurice?
13. 1 point

## UN Mafia III

Taps watch. Oops. RIP MikeD. Would love to hear from maurice.
14. 1 point

15. 1 point

## Binary lock

Real life: I bought (very cheep) a 256MB extension card for a 80286. There were 8 dip switches and no manual. I do not know how many times each switch can be flipped, in any case, it is better to minimize the manipulation. Look https://en.wikipedia.org/wiki/Gray_code
16. 1 point

## Arrange numbers and operators to the magic triangle

Note : A # B = A*10 + B Arrange the numbers 1 to 9 to green triangles, and arrange operator (+,-,x,/,^, and #) to the white triangles, so the math operations below are equals. (((A op1 B) op2 D) op4 F) = constant (((F op4 G) op5 H) op6 I) = constant (((I op6 E) op3 C) op1 A) = constant A x F x I = constant
17. 1 point

## The Donny Hall puzzle

I think phaze is right about the most practical answer. If that fails, I tend to agree with bonanova.
18. 1 point

I believe you replace the ? with digits.
19. 1 point

9^(9-9)=1
20. 1 point

21. 1 point

## I swear:

I swear: 1) To strangle the next person who uses 'suicide' as a verb. 2) That if I offended or hurt you in any way, I didn't mean it. 3) That I'll stop procrastinating. Tomorrow. Add whatever you swear.
22. 1 point

## Lychrel

Code: #include <iostream> #define BUF_SIZE 100 using namespace std; void putInArray(int num, int* buf){ for(int i=0;i<BUF_SIZE;i++){ buf[i] = num % 10; num = num / 10; } } bool isPalindrom(int* buf){ int i=0, j=BUF_SIZE-1; while(buf[j]==0 && j>0){ j--; } while(i<j){ if(buf[i] != buf[j]){ return false; } i++; j--; } return true; } void applyIteration(int* buf){ int i=0, j=BUF_SIZE-1; while(buf[j]==0 && j>0){ j--; } while(i<=j){ int temp = buf[i] + buf[j]; buf[i++] = temp; buf[j--] = temp; } for(int i=0;i<BUF_SIZE-1;i++){ buf[i+1] += buf[i] / 10; buf[i] = buf[i] % 10; } } bool isLychrel(int* buf){ for(int i=1;i<50;i++){ applyIteration(buf); if(isPalindrom(buf)){ return false; } } return true; } int main() { int buf[BUF_SIZE]; for(int num=0;num<10000;num++){ putInArray(num,buf); if(isLychrel(buf)){ cout << num << " is Lychrel " << endl; } } }
23. 1 point

## I'm not a mythical titan

Excellent riddle Plasmid. Those types are my favorite. Give yourself a 5 star vote and make it official. BTW . . . what's the "vote" thing for?
24. 1 point

## 1000 people in a circle

Person 1 is left behind there would be no one to kill him
25. 1 point

## Is it possible to give what we don't have?

Depends on what is meant by "have." [1] If have means "own," then yes. I can give someone something that I do not own. e.g. if I stole it. To give something, one only needs the ability to determine who controls it. If I control it, I can pass its control to someone else. So ... [2] If have means "possess the control of" then no. As stated, the paradox arises from the different antecedents of "with sorrow." Sorrow is the consequence of giving, not a possession before the act. But the language permits that interpretation by its form. Cute.
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