Side by side
Compare tools
3 tools selected
featured
Project Euler
A series of computational math problems you solve by writing a program
4.8
FreeFree to register and solve
featured
Advent of Code
An annual calendar of programming puzzles, with past years still open to solve
4.9
FreeFree; optional donations a…
featured
IXL
K–12 practice in math, English, and science with skill plans teachers assign
4.4
PaidFamily and classroom subsc…
| Spec | Project Euler | Advent of Code | IXL |
|---|---|---|---|
| Category | Education & Learning | Education & Learning | Education & Learning |
| Pricing | Free to register and solve | Free; optional donations and merch | Family and classroom subscriptions; school licenses |
| Rating | 4.8 (7,600) | 4.9 (21,000) | 4.4 (42,000) |
| Community | 94/100 | 96/100 | 84/100 |
| Tier | featured | featured | featured |
| Best for | math, programming, puzzles, practice | puzzles, programming, calendar, practice | k12, practice, math, classroom |
| Top features |
|
|
|