19
votes
Accepted
18
votes
Accepted
5 bosses in a meeting room - Zebra puzzle variation
Deductions
Clues 1 and 19 tell us that
Also, by clues 15 and 18, he must be wearing
Clues 5 and 16 tell us that
Clues 11 and 12 tell us that
But we know Michael is in the 5th, so (also using ...
- 116k
17
votes
14
votes
Accepted
12
votes
Accepted
11
votes
Accepted
A Day at the Zoo
Deductions
1. Charley's favorite only needs 3 unique letters
9. Dad's favorite starts the same as Charley's
3. Fred is a big fan of birds
6. Mary's starts with the same letter as Fred's
7. Heather ...
- 116k
10
votes
Accepted
How do I solve this logic puzzle?
Setup
We have four people (B,G,K,N), four objects sighted (balloon, kite, plane, telephone pole), and four days (Tuesday, Wednesday, Thursday, Friday). Here's the information we've been provided with:...
- 116k
10
votes
10
votes
Accepted
The Grand Grid II
The six hint are highlighted in this image:
First hint:
Second hint:
Third hint:
Fourth hint - solved by @Jens
Fifth hint: - solved by @Jens
Sixth hint:
The final solution and the logic grid is ...
- 1,700
10
votes
Accepted
PSE Advent Calendar 2021 (Day 12): Christmas Confusion
I'm guessing your Christmas present will be
Zizy Archer has solved part 1 giving the order
Now, these gifts
So, now we should have enough information to deduce the arrangement!
- 8,068
9
votes
Accepted
Megan and the rambling reshuffle
I think the solution is:
(in format: name - old position -> new position)
Reasoning:
First, notice that
we also know about
and
We should notice, that
Hence
Next, we should use that
...
- 9,592
9
votes
Five Cousins Camping
Irene and Yvonne are from the same state
Michael and Emily are from different states
The Patterson from Montana
Finally, we can show that the clues are consistent with an example.
And indeed this ...
- 3,628
9
votes
Accepted
Difference grid
The only possible solution is
The position of the three 1s is immediately clear from the minus signs. This helps a lot because we can now always disregard 1s for multiplication clues.
Next to the 5 ...
- 4,972
9
votes
Accepted
Fill the squares with the right tetrominoes
I think this is a valid pattern:
I hope I haven't made any obvious blunders here.
- 58.6k
9
votes
Accepted
Girl Hackers - Logic Puzzle
The solution:
Verification from clues:
The hacker with 36 wins isn't from Portland.
The hacker from Los Angeles is either Yvonne Ware or the hacker with 4 losses.
Yvonne Ware is from Miami.
...
- 631
9
votes
Pizza and Subs - Delivery Dilemma
The answer is
And we can figure this out by
Now the statements we have are:
What about the others?
- 145k
8
votes
Accepted
Can you solve the 7x7 (sudoku-ish) centered sums puzzle
This is quite easy to formulate as a 0-1 integer linear programming problem and then throw at a specialised solver. With no objective function to optimise, lp_solve ...
- 4,521
8
votes
Accepted
Who likes Actress E?
There is not enough information to determine which person chose Actress E.
Suppose we have a situation that satisfies all of the statements. One person chose A, one chose D and one person chose F. ...
- 33.6k
8
votes
The Harry Potter Potions Riddle
So, there's a detail here that I'm surprised has been left out.
In the original book, the picture that's shown above doesn't appear. The picture appears to have been added for a later web-based ...
- 603
8
votes
Accepted
8
votes
Athletes at the Rio Olympics
I still can't get 4 and 14, but here's my contribution to the bonus:
I believe the solution to clue 14 is
- 2,124
8
votes
Accepted
Logic problem about five thieves
We start with some easy observations:
"Damian knows only one of the thieves" and "the hacker is the only one which knows only one other": This implies that Damian is the hacker
"The hacker and the ...
- 45.4k
8
votes
Accepted
Art Accident at Airport!
Here is the solution progressed further thanks to the solver referenced in another answer.
Mike
First, notice that Mary 3 and Mike 1 cannot both be true: they disagree on the bag that went to Houston.
...
- 8,954
8
votes
Accepted
An Artistic Bunch
Final occupations:
Explanation:
Lets see what each line tells us
1:
2:
3:
4:
So using this information lets see what everyone could be and narrow it down from there:
We can instantly see that
...
- 56.4k
8
votes
Accepted
Reasoning puzzle involving five friends and five departments
There are many ways to go about this, but here is the easy grid way. This is a long detailed description for how to solve so someone else will probably beat me with a simpler method, but this one ...
- 2,443
8
votes
Accepted
8
votes
Man of War: A Numbers Problem
The most likely solution:
Here
There are some other somewhat plausible possibilities with different number of machines:
- 2,140
7
votes
Accepted
Athletes at the Rio Olympics
Thanks to Morgan G I could get the last three sports I was missing. I also could not figure out 14.
Answer:
Martin Fuis:
Dumber Nanoslav:
Vastena Nanopi:
Bert ...
- 136
7
votes
14 crosses in a 6 by 6 grid
I think this solution is independant from the ones already published.
Consider those blocks:
A
B
C
Place them anywere on your 6x6 board, and your get dozens of solutions.
- 6,153
7
votes
Accepted
Who owned each heirloom?
What we know:
"Lady Winslow was at the far left"
"next to the guest wearing a green jacket"
"falling onto the guest in the center seat, spilling the poor woman's rum."
"The lady in red sat left ...
- 2,104
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