Racket Track Management

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

Students
3,164
Submissions
25,637
Mentoring Discussions
626

The Racket track needs attention ⚠️

Building

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: b2d2aee576f0da5bd62b0767c8a0779b85dc0e44 (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
77 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
2,178
3,235 (avg. 1.5)
1,827 (83.9%)
3 (0.1%)
Acronym Acronym
154
506 (avg. 3.3)
102 (66.2%)
2 (1.3%)
Armstrong Numbers Armstrong Numbers
155
338 (avg. 2.2)
127 (81.9%)
2 (1.3%)
Atbash Cipher Atbash Cipher
62
182 (avg. 2.9)
40 (64.5%)
0 (0.0%)
Binary Search Binary Search
22
80 (avg. 3.6)
18 (81.8%)
0 (0.0%)
Bob Bob
279
1,139 (avg. 4.1)
211 (75.6%)
27 (9.7%)
Clock Clock
13
40 (avg. 3.1)
8 (61.5%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
258
926 (avg. 3.6)
209 (81.0%)
26 (10.1%)
D&D Character D&D Character
59
239 (avg. 4.1)
35 (59.3%)
1 (1.7%)
Darts Darts
34
53 (avg. 1.6)
24 (70.6%)
2 (5.9%)
Difference of Squares Difference of Squares
556
1,375 (avg. 2.5)
480 (86.3%)
56 (10.1%)
ETL ETL
128
260 (avg. 2.0)
97 (75.8%)
4 (3.1%)
Eliud's Eggs Eliud's Eggs
14
14 (avg. 1.0)
9 (64.3%)
0 (0.0%)
Gigasecond Gigasecond
322
508 (avg. 1.6)
272 (84.5%)
32 (9.9%)
Grains Grains
1,247
3,878 (avg. 3.1)
751 (60.2%)
148 (11.9%)
Grep Grep
93
231 (avg. 2.5)
55 (59.1%)
3 (3.2%)
Hamming Hamming
272
623 (avg. 2.3)
224 (82.4%)
24 (8.8%)
High Scores High Scores
14
45 (avg. 3.2)
9 (64.3%)
0 (0.0%)
Isogram Isogram
128
362 (avg. 2.8)
99 (77.3%)
5 (3.9%)
Leap Leap
668
1,517 (avg. 2.3)
592 (88.6%)
75 (11.2%)
List Ops List Ops
127
378 (avg. 3.0)
79 (62.2%)
5 (3.9%)
Nucleotide Count Nucleotide Count
130
296 (avg. 2.3)
106 (81.5%)
5 (3.8%)
Pangram Pangram
12
14 (avg. 1.2)
8 (66.7%)
0 (0.0%)
Protein Translation Protein Translation
18
47 (avg. 2.6)
11 (61.1%)
0 (0.0%)
Proverb Proverb
10
18 (avg. 1.8)
6 (60.0%)
0 (0.0%)
Queen Attack Queen Attack
3
4 (avg. 1.3)
2 (66.7%)
0 (0.0%)
RNA Transcription RNA Transcription
148
204 (avg. 1.4)
131 (88.5%)
6 (4.1%)
Raindrops Raindrops
132
301 (avg. 2.3)
112 (84.8%)
6 (4.5%)
Resistor Color Resistor Color
15
27 (avg. 1.8)
11 (73.3%)
1 (6.7%)
Resistor Color Duo Resistor Color Duo
15
33 (avg. 2.2)
11 (73.3%)
1 (6.7%)
Resistor Color Trio Resistor Color Trio
15
93 (avg. 6.2)
10 (66.7%)
2 (13.3%)
Reverse String Reverse String
310
365 (avg. 1.2)
230 (74.2%)
4 (1.3%)
Roman Numerals Roman Numerals
140
258 (avg. 1.8)
110 (78.6%)
6 (4.3%)
Scrabble Score Scrabble Score
210
443 (avg. 2.1)
180 (85.7%)
22 (10.5%)
Sieve Sieve
9
10 (avg. 1.1)
5 (55.6%)
0 (0.0%)
Space Age Space Age
17
16 (avg. 0.9)
9 (52.9%)
0 (0.0%)
Square Root Square Root
21
31 (avg. 1.5)
15 (71.4%)
0 (0.0%)
Strain Strain
12
13 (avg. 1.1)
8 (66.7%)
0 (0.0%)
Triangle Triangle
33
91 (avg. 2.8)
25 (75.8%)
0 (0.0%)
Two Fer Two Fer
658
2,162 (avg. 3.3)
493 (74.9%)
97 (14.7%)
Affine Cipher Affine Cipher
88
396 (avg. 4.5)
49 (55.7%)
3 (3.4%)
All Your Base All Your Base
225
476 (avg. 2.1)
112 (49.8%)
3 (1.3%)
Allergies Allergies
88
130 (avg. 1.5)
68 (77.3%)
0 (0.0%)
Alphametics Alphametics
28
235 (avg. 8.4)
8 (28.6%)
3 (10.7%)
Anagram Anagram
144
290 (avg. 2.0)
121 (84.0%)
9 (6.3%)
Circular Buffer Circular Buffer
10
17 (avg. 1.7)
3 (30.0%)
0 (0.0%)
Diamond Diamond
5
17 (avg. 3.4)
2 (40.0%)
0 (0.0%)
Food Chain Food Chain
5
66 (avg. 13.2)
2 (40.0%)
0 (0.0%)
Grade School Grade School
6
6 (avg. 1.0)
2 (33.3%)
0 (0.0%)
House House
26
66 (avg. 2.5)
14 (53.8%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
6
7 (avg. 1.2)
2 (33.3%)
0 (0.0%)
Knapsack Knapsack
6
13 (avg. 2.2)
3 (50.0%)
0 (0.0%)
Largest Series Product Largest Series Product
8
6 (avg. 0.8)
3 (37.5%)
0 (0.0%)
Matching Brackets Matching Brackets
103
476 (avg. 4.6)
76 (73.8%)
1 (1.0%)
Meetup Meetup
91
165 (avg. 1.8)
49 (53.8%)
5 (5.5%)
Pascal's Triangle Pascal's Triangle
7
6 (avg. 0.9)
3 (42.9%)
0 (0.0%)
Perfect Numbers Perfect Numbers
385
1,121 (avg. 2.9)
325 (84.4%)
40 (10.4%)
Phone Number Phone Number
107
210 (avg. 2.0)
84 (78.5%)
1 (0.9%)
Pig Latin Pig Latin
5
7 (avg. 1.4)
2 (40.0%)
0 (0.0%)
Robot Name Robot Name
170
470 (avg. 2.8)
106 (62.4%)
3 (1.8%)
Robot Simulator Robot Simulator
5
10 (avg. 2.0)
2 (40.0%)
0 (0.0%)
Rotational Cipher Rotational Cipher
15
21 (avg. 1.4)
9 (60.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
5
19 (avg. 3.8)
2 (40.0%)
0 (0.0%)
Say Say
66
159 (avg. 2.4)
42 (63.6%)
0 (0.0%)
Secret Handshake Secret Handshake
5
3 (avg. 0.6)
2 (40.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
5
20 (avg. 4.0)
2 (40.0%)
0 (0.0%)
Sublist Sublist
30
54 (avg. 1.8)
17 (56.7%)
2 (6.7%)
Twelve Days Twelve Days
51
194 (avg. 3.8)
34 (66.7%)
2 (3.9%)
Two Bucket Two Bucket
5
7 (avg. 1.4)
2 (40.0%)
0 (0.0%)
Word Count Word Count
130
260 (avg. 2.0)
102 (78.5%)
4 (3.1%)
Yacht Yacht
8
31 (avg. 3.9)
4 (50.0%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
7
14 (avg. 2.0)
3 (42.9%)
0 (0.0%)
Bank Account Bank Account
6
28 (avg. 4.7)
2 (33.3%)
0 (0.0%)
Luhn Luhn
10
21 (avg. 2.1)
4 (40.0%)
0 (0.0%)
Minesweeper Minesweeper
9
16 (avg. 1.8)
3 (33.3%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
9
69 (avg. 7.7)
5 (55.6%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
53
170 (avg. 3.2)
23 (43.4%)
2 (3.8%)
1 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
5
6 (avg. 1.2)
3 (60.0%)
1 (20.0%)
52 unimplemented practice exercises
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Complex Numbers Complex Numbers
Connect Connect
Conway's Game of Life Conway's Game of Life
Crypto Square Crypto Square
Custom Set Custom Set
Dominoes Dominoes
DOT DSL DOT DSL
Error Handling Error Handling
Flatten Array Flatten Array
Forth Forth
Go Counting Go Counting
Hangman Hangman
ISBN Verifier ISBN Verifier
Killer Sudoku Helper Killer Sudoku Helper
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
Markdown Markdown
Matrix Matrix
Micro Blog Micro Blog
Nth Prime Nth Prime
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Poker Poker
POV POV
Prime Factors Prime Factors
Pythagorean Triplet Pythagorean Triplet
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
REST API REST API
Saddle Points Saddle Points
Satellite Satellite
Series Series
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
State of Tic-Tac-Toe State of Tic-Tac-Toe
Sum of Multiples Sum of Multiples
Tournament Tournament
Transpose Transpose
Tree Building Tree Building
Word Search Word Search
Wordy Wordy
Zipper Zipper

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: 21031e933edef3759b9fd6bd634a85f35d52fbb7 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. Racket is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
24,094
Test Run Pass Rate
39.9% (9624)
Test Run Fail Rate
57.0% (13744)
Test Run Error Rate
3.0% (726)

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 Racket: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.