Newest Questions
29,535 questions
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Which triangle has the larger area?
In the diagram, AFH, ABGF, ABCDE are all regular polygons.
Which triangle has larger area: red or blue? Or do they have the same area?
Note: Geogebra can be used to help, but an answer saying "...
- 4,327
-1
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0
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Navigate the colored tiles
I’m stuck on this level of Game 2 (from 42). I start on a green tile, and I have the commands:
Move forward (⬆️)
Turn left (↩️)
Turn right (↪️)
Conditional colors: 🟥 🟩 🟦
Functions: f0 and f1
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Where to find valid Yin-Yang puzzle data?
I've built a website offering "Pips" domino puzzles, and am thinking about adding Yin-Yang puzzles. But I've had trouble generating valid puzzles. Are there data sets that I can use?
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Sleeping Beauty's evaporating certainty
I thought of a little puzzle while contemplating the Sleeping Beauty problem.
The puzzle: create a variant of the Sleeping Beauty experiment (which involves one fair coin toss) where there is a ...
- 10.9k
21
votes
1
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475
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Triangles on regular pentagons
The two regular pentagons share a vertex and an edge. The side of the larger pentagon is twice that of the smaller one. Which triangle has larger area, red or blue? Or do they have the same area?
- 17.4k
5
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A curious Slitherlink Deduction
In the following Slitherlink, where you need to make one unbroken loop over the grid with the number in each cell matching the number of edges around that cell, I noticed that the 3-2-2-1 2x2 box at ...
- 6,709
3
votes
1
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Sweet and sour but also devoted what am I
I am devoted…. I am sweet…. Sometimes I am sour. I am like a punctuation. You all know me. We often clash.
Who, what or where am I?
I am very big, you can’t miss me. Yet I am small, like a ...
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4
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The "e" in apple
I cut a thin slice from a spherical apple, cutting along a plane.
Then I realized, there is an "e" in apple.
Why is there an "e" in apple?
Hint:
OK, time to drop another hint:
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Number Mapping Riddle - How does F work?
Here is the mapping F: {0, 1, …, 63} —> N.
F(0) = F(1) = 11029
F(2) = F(3) = 8263
F(4) = F(5) = F(6) = F(7) = 12992
F(8) = F(9) = 14188
F(10) = F(11) = F(14) = 347870
F(12) = F(13) = 2697
F(15) = ...
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The English teacher and his two bright students
The English teacher decides to test his 2 bright students Joe and Mina. He writes down 2 letters on 2 separate cards and gives one to Jo and one to Mina. He then says, ”Guys, I have written down a 3 ...
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4
votes
3
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Garbage in, garbage out
I am an object that's collected garbage, but that's also carelessly distributed garbage. Those who produce me might regularly use me to collect their waste. What am I?
(Edited to reduce ambiguity.)
- 1,498
10
votes
1
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260
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6
votes
1
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529
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My Six Children
The sum of the ages of my three boys, who are all different ages, is equal to the product of my three daughters' ages; vice versa, the sum of my three daughters' ages is equal to the product of my ...
- 20.5k
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votes
1
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I need to name this class
I was digging though this grim looking code base from like thousands of years ago. I came across this class function, but the class's name was obfuscated. What should this class be named?
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- 1,465
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If it goes down, it goes flying, and as soon as it reaches the ground, it dies.
Something that lives in the corner of the ceiling and never touches the floor.
If it goes down, it goes flying, and as soon as it reaches the ground, it dies.
The meaning is metaphorical.
This riddle ...
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