All Questions
27,812
questions
0
votes
0
answers
14
views
Number puzzle with some algebra
I have a even number and the reciprocal of the number of possibilities of writing it as the sum of two different integers and the sum of the number is 13/2 then what's my number??
4
votes
0
answers
82
views
Note the hidden way!
The answer to this puzzle is a 5 letter word. (this is a definitive list)
...
- 16.5k
10
votes
1
answer
105
views
3
votes
1
answer
79
views
7x10 floor and a 8x8 and a 6x1 carpet, only one cut allowed
We have a 8x8 carpet, we can do only one cut of any complexity and also we have an uncuttable 6x1 carpet. We need to fill a 7x10 space using those 2. The 8x8 can only be cut into two pieces.
We have ...
- 33
12
votes
1
answer
405
views
Make both colors connected
Is it possible to rearrange the 8 rectangles shown below (only translation, no rotation or reflection) so that the red squares form a connected region and the white squares form a connected region? ...
- 772
4
votes
2
answers
344
views
Explain This Star Battle Clue
I'm playing a 2-star 9x9 grid game. The app provides incremental clues when requested.
In this scenario, the clue states "the green region cannot be finished."
I'm just not seeing it, nor ...
- 143
-1
votes
1
answer
89
views
A Hat Guessing Problem without Much Meta Knowledge
Three perfect logicians are seated such that they can all see one-another. They each have a hat with a non-negative integer on it. It is known that the number on one of the hats is the sum of the ...
- 2,580
3
votes
0
answers
136
views
Who's that Pokémon?
Trainer LEO would like to battle.
Trainer LEO sent out CATERPIE
Trainer LEO sent out RATICATE
Trainer LEO sent out NIDORINA
Trainer LEO sent out DIGLETT
Trainer LEO sent out SLOWBRO
Trainer LEO sent ...
- 11.2k
0
votes
1
answer
73
views
Grub First, then Ethics
I am a structure, built with care,
My base is wide, with much to share.
Ascend my levels, less you'll find,
But each step up, fulfillment's aligned.
What am I?
1
vote
1
answer
169
views
Calculation puzzle
I am trying to solve a Black Box puzzle from workroom productions. It features several buttons and lights. When you press the button(s), some light(s) turn on, while others may turn off. You can ...
- 19
5
votes
1
answer
204
views
How to obtain the evolutionary animal?
How to obtain some organisms:
An English verb (2) → A venomous insect (3)
A Spanish pronoun, without the diacritic (2) → A long fish (3)
An English color (3) → A plant, not for eating (4)
A German ...
- 5,317
3
votes
1
answer
688
views
Mystery sequence: F C R B C B O T B
Here is a sequence. What letter comes next?
F, C, R, B, C, B, O, T, B, ...
I expect it will take some time to answer this.
- 30.9k
25
votes
1
answer
2k
views
My newspaper was stolen
A few days ago, I was surprised to find my weekly newspaper hadn't arrived on time.
After a few days I realised it must have been taken by someone... probably the postman as I'd caught him reading my ...
- 61k
14
votes
1
answer
757
views
Solid border Yin-Yang
Yin-Yang is a grid deduction puzzle with the following rules:
Fill each cell with either a black circle or a white circle.
All circles of a given color must form a single orthogonally-connected ...
- 3,486
18
votes
1
answer
678
views
Dividing shape into 2 congruent pieces
How do I divide this shape into 2 congruent polygons?
Source: Penrose Tiles to Trapdoor Ciphers...and the Return of Dr. Matrix by Martin Gardner, Chapter 12 (no solutions in the book though).
- 772