We’re rewarding the question askers & reputations are being recalculated! Read more.
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Favorites infavorites:mine
infavorites:1234
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with Search options user 68

A puzzle that requires formal logical deduction to arrive at the solution. This suggests more than merely reasoning through clues to find an answer (you might want [situation] for that).

1
vote
We have an amount of red sand $R$ and an amount of blue sand $U$. $R$ does not have to be equal to $U$. We pour our sand in two beakers, so that beaker A contains all the red sand and beaker B contain …
answered Oct 27 '14 by SQB
-2
votes
This way, each sibling got to either divide or choose and should be happy. This is different from the cake solution, since a cake can be cut, but not joined. To address some points raised in t …
answered Oct 15 '14 by SQB
9
votes
Right now, we have $x$ minutes left until 6 o'clock. 50 minutes ago, it was $4x$ minutes past 3 o'clock. That means that the time between 3 o'clock and 6 o'clock, 180 minutes, is equal to the sum of t …
answered May 22 '14 by SQB
13
votes
2answers
In Heinlein's Space Cadet, one of many tests administered to the protagonist seems to have no way of scoring any points. See the excerpt below. Late in the day he was ushered into a cubbyhole cont …
asked May 22 '14 by SQB
0
votes
If you have to bury yourself up to your neck, you need your arms to do so. While there may be sand up to your neck, your arms will have been free enough to dig yourself in, so they will be free enough …
answered Oct 22 '14 by SQB
2
votes
4answers
Once again, you're on your way to Acarien. You find yourself in a land of Knights and Knaves, who understand your language but don't speak it. You understand nor speak their language, but you do know …
asked Oct 24 '14 by SQB
8
votes
With three children, three red hats and two black hats, there are 7 different configurations possible: $$\begin{array}{cccl} \text{Alice} & \text{Bob} & \text{Carol} \\ \\ \hline \text{red} & \text …
answered May 20 '14 by SQB
0
votes
Since they both claim to be a different one of the available options, they're either both "truthing" or both lying. Since at least one of them is lying, they're not both speaking the truth and so the …
answered Feb 1 '16 by SQB
28
votes
For a total of $n$ cars, of which $w$ are white, $r$ are red, $g$ are green, and $c$ have another colour: $$\begin{align} n & , w, r, g, c \in \mathbb{Z}_{\ge 0} \tag{1} \label{eq1} \\ n & = w + …
answered Nov 17 '14 by SQB
1
vote
There are now 3 possible scenarios. Once Yes, Once No You can now use the knowledge that the Guardian will lie on the next two questions to determine the box with the treasure. Twice No You' …
answered Sep 15 '17 by SQB
34
votes
Let's put the number of coins at $c$ and see what happens if we increase $n$. We'll number the pirates from meekest ($1$) to fiercest ($n$). $\begin{array}{rrrll} \begin{array}{c}\text{Nr. of pirat …
answered May 20 '14 by SQB
2
votes
Within a group of $n$ teams, there are $\frac{n (n - 1)}{2}$ points to share. But that goes for each subgroup as well. A subgroup of m teams, where $m < n$, will have $\frac{m (m - 1)}{2}$ points betw …
answered May 15 '14 by SQB
1
vote
No, they cannot escape. Mark sees his window with the 12 bars. He can deduce Rose has either 6 or 8 bars in her window. He does not know which. However, he can deduce that Rose will have deduced he h …
answered Nov 15 '16 by SQB
12
votes
I've answered this over on Math.SE, so I'll just quote most of that. Suppose we have $n$ doors, with a car behind $1$ of them. The probability of choosing the door with the car behind it on your f …
answered Oct 29 '14 by SQB
8
votes
It's But what happened to the poodle?
answered Nov 8 '14 by SQB

15 30 50 per page