8th
8th
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8th Track Management

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

Students
3,314
Submissions
11,442
Mentoring Discussions
45

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Practice Exercises

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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: 9034bcb6aa38540e1a67ba2fa6b76001f50c094b (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
2,566
6,248 (avg. 2.4)
436 (17.0%)
0 (0.0%)
Two Fer Two Fer
286
1,810 (avg. 6.3)
65 (22.7%)
8 (2.8%)
Gigasecond Gigasecond
74
174 (avg. 2.4)
39 (52.7%)
1 (1.4%)
Leap Leap
74
448 (avg. 6.1)
41 (55.4%)
1 (1.4%)
Triangle Triangle
37
404 (avg. 10.9)
24 (64.9%)
2 (5.4%)
Trinary (Base-3) Numbers Trinary (Base-3) Numbers
28
235 (avg. 8.4)
22 (78.6%)
0 (0.0%)
Darts Darts
23
147 (avg. 6.4)
21 (91.3%)
3 (13.0%)
Resistor Color Resistor Color
18
54 (avg. 3.0)
14 (77.8%)
3 (16.7%)
Bob Bob
19
99 (avg. 5.2)
15 (78.9%)
0 (0.0%)
Hamming Hamming
27
148 (avg. 5.5)
18 (66.7%)
1 (3.7%)
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
16
55 (avg. 3.4)
12 (75.0%)
0 (0.0%)
Acronym Acronym
20
62 (avg. 3.1)
13 (65.0%)
1 (5.0%)
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
24
98 (avg. 4.1)
20 (83.3%)
2 (8.3%)
Affine Cipher Affine Cipher
13
40 (avg. 3.1)
11 (84.6%)
0 (0.0%)
Pythagorean Triplet Pythagorean Triplet
13
94 (avg. 7.2)
8 (61.5%)
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
12
34 (avg. 2.8)
10 (83.3%)
1 (8.3%)
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
4
2 (avg. 0.5)
2 (50.0%)
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
3
1 (avg. 0.3)
1 (33.3%)
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
4
4 (avg. 1.0)
1 (25.0%)
1 (25.0%)
Phone Number Phone Number
4
19 (avg. 4.8)
2 (50.0%)
1 (25.0%)
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
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Bank Account Bank Account
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Binary Search Tree Binary Search Tree
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Book Store Book Store
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Bottle Song Bottle Song
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Bowling Bowling
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Change Change
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Clock Clock
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Complex Numbers Complex Numbers
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Connect Connect
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Conway's Game of Life Conway's Game of Life
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Crypto Square Crypto Square
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Custom Set Custom Set
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Dominoes Dominoes
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DOT DSL DOT DSL
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Error Handling Error Handling
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Forth Forth
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Go Counting Go Counting
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Grade School Grade School
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Grep Grep
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Hangman Hangman
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House House
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ISBN Verifier ISBN Verifier
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Killer Sudoku Helper Killer Sudoku Helper
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Ledger Ledger
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Lens Person Lens Person
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Linked List Linked List
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Markdown Markdown
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Micro Blog Micro Blog
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Minesweeper Minesweeper
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Nth Prime Nth Prime
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OCR Numbers OCR Numbers
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PaaS I/O PaaS I/O
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Palindrome Products Palindrome Products
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Pig Latin Pig Latin
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Poker Poker
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POV POV
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Prime Factors Prime Factors
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Queen Attack Queen Attack
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Rail Fence Cipher Rail Fence Cipher
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Rational Numbers Rational Numbers
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React React
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Rectangles Rectangles
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Resistor Color Duo Resistor Color Duo
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Resistor Color Trio Resistor Color Trio
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REST API REST API
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Robot Name Robot Name
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Robot Simulator Robot Simulator
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Run-Length Encoding Run-Length Encoding
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Saddle Points Saddle Points
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Satellite Satellite
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Say Say
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SGF Parsing SGF Parsing
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Simple Cipher Simple Cipher
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Simple Linked List Simple Linked List
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State of Tic-Tac-Toe State of Tic-Tac-Toe
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Sublist Sublist
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Tournament Tournament
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Transpose Transpose
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Tree Building Tree Building
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Twelve Days Twelve Days
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Two Bucket Two Bucket
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Variable Length Quantity Variable Length Quantity
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Word Search Word Search
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Wordy Wordy
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Zebra Puzzle Zebra Puzzle
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Zipper Zipper
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Programming Tags

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

0 tags

Test Runner

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

Current version: 054e5d2eec217c82e827e5ae9660fbfc180276a7 (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
11,402
Test Run Pass Rate
14.1% (1603)
Test Run Fail Rate
26.1% (2972)
Test Run Error Rate
59.9% (6827)

Representer

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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

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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.