All Questions
Tagged with reverse-puzzling mathematics
7
questions
6
votes
2
answers
13k
views
Math puzzle: I know the answer, what is the equation? Use all digits 1-9
A few years ago, my child brought a puzzle home from their 6th-grade math teacher. The solution was to use all the numbers $1−9$ only once and make the equation true. Using a spreadsheet, I was able ...
- 63
1
vote
0
answers
449
views
Not a sudoku, but still fun?
Context:
I was trying to solve some of the puzzles on this site, when it occurred to me to make a puzzle variant myself.
I immediately could construct one with my additional rule. Making an ...
- 9,366
12
votes
2
answers
579
views
What was Matt's matchstick puzzle?
Something rather funny happened at our Puzzlers' meet the other day.
"Oh hey buddy, can you hand me exactly 18 matchsticks? I wanna show you this new matchstick puzzle I came up with." Matt ...
- 19.7k
7
votes
1
answer
778
views
My friend is being a hypocrite
So I was having an argument with a friend and I know I'm right, but she just won't admit it and it's getting really irritating. She thinks this thing goes one way when it clearly actually goes down!
...
- 1,575
6
votes
2
answers
540
views
I have a puzzle and a solution... it's the method I'm after
The cipher message is:
J B A Z R X K Z N
T W K O Y E Z
The answer is:
T O N G L A N D
B R I D G E
How did I (or more accurately my father) arrive at the answer?
- 61
11
votes
5
answers
945
views
My roommate is back add it!
My roommate's computer desk has a paper on it with these 3 weird grids and drawings. I know that he is trying to learn to write computer code and he likes making old video games as a way to learn. I'...
- 379
11
votes
4
answers
1k
views
A line in Connect Four
When I was young, I was playing with a friend. Of course, the topic soon turned to mathematics (as it always does), and we got into an argument over something. We went on for some time, then he got ...
- 22k