8th
8th
About 8thPractice

8th Track Management

This page provides the Exercism community with the information and tools needed to manage the 8th track.

Students
3,887
Submissions
13,938
Mentoring Discussions
45

The 8th track needs attention ⚠️

Building

Practice Exercises

Learn More

Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: da58ad5cbdb456607c81431f9367931f60e6e849 (Updates should be instant)

Next goal: Implement 130 practice exercises. Find out more.
63 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
3,094
7,460 (avg. 2.4)
528 (17.1%)
0 (0.0%)
Two Fer Two Fer
337
2,074 (avg. 6.2)
68 (20.2%)
8 (2.4%)
Gigasecond Gigasecond
81
176 (avg. 2.2)
40 (49.4%)
1 (1.2%)
Leap Leap
81
526 (avg. 6.5)
47 (58.0%)
1 (1.2%)
Triangle Triangle
39
433 (avg. 11.1)
25 (64.1%)
2 (5.1%)
Trinary (Base-3) Numbers Trinary (Base-3) Numbers
29
250 (avg. 8.6)
23 (79.3%)
0 (0.0%)
Darts Darts
25
152 (avg. 6.1)
22 (88.0%)
3 (12.0%)
Resistor Color Resistor Color
19
61 (avg. 3.2)
15 (78.9%)
3 (15.8%)
Bob Bob
19
99 (avg. 5.2)
15 (78.9%)
0 (0.0%)
Hamming Hamming
59
611 (avg. 10.4)
44 (74.6%)
1 (1.7%)
Raindrops Raindrops
20
46 (avg. 2.3)
13 (65.0%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
18
40 (avg. 2.2)
14 (77.8%)
0 (0.0%)
Isogram Isogram
16
22 (avg. 1.4)
13 (81.3%)
1 (6.3%)
Word Count Word Count
17
55 (avg. 3.2)
12 (70.6%)
0 (0.0%)
Acronym Acronym
21
63 (avg. 3.0)
13 (61.9%)
1 (4.8%)
Luhn Credit Card Number Checker Luhn Credit Card Number Checker
21
198 (avg. 9.4)
16 (76.2%)
1 (4.8%)
Collatz Conjecture Collatz Conjecture
19
54 (avg. 2.8)
18 (94.7%)
1 (5.3%)
Series Series
18
197 (avg. 10.9)
16 (88.9%)
2 (11.1%)
Pangram Pangram
16
49 (avg. 3.1)
13 (81.3%)
1 (6.3%)
Atbash Cipher Atbash Cipher
16
160 (avg. 10.0)
13 (81.3%)
3 (18.8%)
Yacht Yacht
14
156 (avg. 11.1)
13 (92.9%)
2 (14.3%)
Roman Numerals Roman Numerals
15
33 (avg. 2.2)
12 (80.0%)
1 (6.7%)
Reverse string Reverse string
25
99 (avg. 4.0)
21 (84.0%)
2 (8.0%)
Affine Cipher Affine Cipher
13
40 (avg. 3.1)
11 (84.6%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
14
345 (avg. 24.6)
9 (64.3%)
0 (0.0%)
Sieve Sieve
10
38 (avg. 3.8)
6 (60.0%)
0 (0.0%)
ETL ETL
7
23 (avg. 3.3)
6 (85.7%)
0 (0.0%)
Eliud's Eggs Eliud's Eggs
37
184 (avg. 5.0)
33 (89.2%)
1 (2.7%)
Difference of Squares Difference of Squares
4
27 (avg. 6.8)
3 (75.0%)
2 (50.0%)
Matching Brackets Matching Brackets
5
91 (avg. 18.2)
4 (80.0%)
3 (60.0%)
Grains Grains
5
4 (avg. 0.8)
2 (40.0%)
0 (0.0%)
RNA Transcription RNA Transcription
4
8 (avg. 2.0)
2 (50.0%)
1 (25.0%)
Scrabble Score Scrabble Score
3
2 (avg. 0.7)
1 (33.3%)
0 (0.0%)
Sum of Multiples Sum of Multiples
3
14 (avg. 4.7)
2 (66.7%)
1 (33.3%)
High Scores High Scores
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Largest Series Product Largest Series Product
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
4
8 (avg. 2.0)
2 (50.0%)
1 (25.0%)
Perfect Numbers Perfect Numbers
3
2 (avg. 0.7)
1 (33.3%)
0 (0.0%)
Rotational Cipher Rotational Cipher
3
3 (avg. 1.0)
1 (33.3%)
0 (0.0%)
Flatten Array Flatten Array
4
5 (avg. 1.3)
2 (50.0%)
1 (25.0%)
Space Age Space Age
3
16 (avg. 5.3)
2 (66.7%)
0 (0.0%)
Square Root Square Root
5
13 (avg. 2.6)
1 (20.0%)
0 (0.0%)
Protein Translation Protein Translation
3
3 (avg. 1.0)
2 (66.7%)
1 (33.3%)
Strain Strain
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Nucleotide Count Nucleotide Count
3
6 (avg. 2.0)
1 (33.3%)
0 (0.0%)
Matrix Matrix
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
All Your Base All Your Base
4
22 (avg. 5.5)
1 (25.0%)
0 (0.0%)
Proverb Proverb
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
4
1 (avg. 0.3)
1 (25.0%)
0 (0.0%)
Allergies Allergies
3
2 (avg. 0.7)
1 (33.3%)
0 (0.0%)
D&D Character D&D Character
3
1 (avg. 0.3)
1 (33.3%)
0 (0.0%)
Meetup Meetup
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Food Chain Food Chain
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Binary Search Binary Search
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
List Ops List Ops
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Secret Handshake Secret Handshake
3
3 (avg. 1.0)
2 (66.7%)
0 (0.0%)
Anagram Anagram
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
Spiral Matrix Spiral Matrix
3
10 (avg. 3.3)
1 (33.3%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
2
1 (avg. 0.5)
1 (50.0%)
0 (0.0%)
Diamond Diamond
5
5 (avg. 1.0)
1 (20.0%)
1 (20.0%)
Phone Number Phone Number
5
22 (avg. 4.4)
2 (40.0%)
1 (20.0%)
Knapsack Knapsack
3
2 (avg. 0.7)
1 (33.3%)
0 (0.0%)
Circular Buffer Circular Buffer
6
10 (avg. 1.7)
1 (16.7%)
0 (0.0%)
67 unimplemented practice exercises
Alphametics Alphametics
View dataThe link opens in a new window or tab
Bank Account Bank Account
View dataThe link opens in a new window or tab
Binary Search Tree Binary Search Tree
View dataThe link opens in a new window or tab
Book Store Book Store
View dataThe link opens in a new window or tab
Bottle Song Bottle Song
View dataThe link opens in a new window or tab
Bowling Bowling
View dataThe link opens in a new window or tab
Change Change
View dataThe link opens in a new window or tab
Clock Clock
View dataThe link opens in a new window or tab
Complex Numbers Complex Numbers
View dataThe link opens in a new window or tab
Connect Connect
View dataThe link opens in a new window or tab
Conway's Game of Life Conway's Game of Life
View dataThe link opens in a new window or tab
Crypto Square Crypto Square
View dataThe link opens in a new window or tab
Custom Set Custom Set
View dataThe link opens in a new window or tab
Dominoes Dominoes
View dataThe link opens in a new window or tab
DOT DSL DOT DSL
View dataThe link opens in a new window or tab
Error Handling Error Handling
View dataThe link opens in a new window or tab
Forth Forth
View dataThe link opens in a new window or tab
Go Counting Go Counting
View dataThe link opens in a new window or tab
Grade School Grade School
View dataThe link opens in a new window or tab
Grep Grep
View dataThe link opens in a new window or tab
Hangman Hangman
View dataThe link opens in a new window or tab
House House
View dataThe link opens in a new window or tab
ISBN Verifier ISBN Verifier
View dataThe link opens in a new window or tab
Killer Sudoku Helper Killer Sudoku Helper
View dataThe link opens in a new window or tab
Ledger Ledger
View dataThe link opens in a new window or tab
Lens Person Lens Person
View dataThe link opens in a new window or tab
Linked List Linked List
View dataThe link opens in a new window or tab
Markdown Markdown
View dataThe link opens in a new window or tab
Micro Blog Micro Blog
View dataThe link opens in a new window or tab
Minesweeper Minesweeper
View dataThe link opens in a new window or tab
Nth Prime Nth Prime
View dataThe link opens in a new window or tab
OCR Numbers OCR Numbers
View dataThe link opens in a new window or tab
PaaS I/O PaaS I/O
View dataThe link opens in a new window or tab
Palindrome Products Palindrome Products
View dataThe link opens in a new window or tab
Pig Latin Pig Latin
View dataThe link opens in a new window or tab
Poker Poker
View dataThe link opens in a new window or tab
POV POV
View dataThe link opens in a new window or tab
Prime Factors Prime Factors
View dataThe link opens in a new window or tab
Queen Attack Queen Attack
View dataThe link opens in a new window or tab
Rail Fence Cipher Rail Fence Cipher
View dataThe link opens in a new window or tab
Rational Numbers Rational Numbers
View dataThe link opens in a new window or tab
React React
View dataThe link opens in a new window or tab
Rectangles Rectangles
View dataThe link opens in a new window or tab
Resistor Color Duo Resistor Color Duo
View dataThe link opens in a new window or tab
Resistor Color Trio Resistor Color Trio
View dataThe link opens in a new window or tab
REST API REST API
View dataThe link opens in a new window or tab
Robot Name Robot Name
View dataThe link opens in a new window or tab
Robot Simulator Robot Simulator
View dataThe link opens in a new window or tab
Run-Length Encoding Run-Length Encoding
View dataThe link opens in a new window or tab
Saddle Points Saddle Points
View dataThe link opens in a new window or tab
Satellite Satellite
View dataThe link opens in a new window or tab
Say Say
View dataThe link opens in a new window or tab
SGF Parsing SGF Parsing
View dataThe link opens in a new window or tab
Simple Cipher Simple Cipher
View dataThe link opens in a new window or tab
Simple Linked List Simple Linked List
View dataThe link opens in a new window or tab
State of Tic-Tac-Toe State of Tic-Tac-Toe
View dataThe link opens in a new window or tab
Sublist Sublist
View dataThe link opens in a new window or tab
Tournament Tournament
View dataThe link opens in a new window or tab
Transpose Transpose
View dataThe link opens in a new window or tab
Tree Building Tree Building
View dataThe link opens in a new window or tab
Twelve Days Twelve Days
View dataThe link opens in a new window or tab
Two Bucket Two Bucket
View dataThe link opens in a new window or tab
Variable Length Quantity Variable Length Quantity
View dataThe link opens in a new window or tab
Word Search Word Search
View dataThe link opens in a new window or tab
Wordy Wordy
View dataThe link opens in a new window or tab
Zebra Puzzle Zebra Puzzle
View dataThe link opens in a new window or tab
Zipper Zipper
View dataThe link opens in a new window or tab

Programming Tags

Learn More

Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

Learn More

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: d0d09f1bbca04ca3b15b342f79da85558fc56ac9 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. 8th is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
13,892
Test Run Pass Rate
13.6% (1887)
Test Run Fail Rate
26.2% (3644)
Test Run Error Rate
60.2% (8361)

Representer

Learn More

Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

Learn More

Build an Analyzer for 8th: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.