Search Results
| 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 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| 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 combinatorics
Search options not deleted
user 95915
A puzzle based on combinatorics, which is the study of counting discrete structures. Use with [mathematics]
3
votes
Accepted
How many triangles in the picture?
As it's a puzzle stack exchange, all the maths isn't shown, but there is a formula for the pattern of side of length $n$, in the diagram $n=8$
$$\frac{n}{12}(13n^2+15n+20)$$
for $n/2$ even and the sam …
- 304