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Racket Track Management

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

Students
3,213
Submissions
26,777
Mentoring Discussions
632

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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: 1262bf8519b4dd0f9cbde99c75220a4843da44ae (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
2,234
3,308 (avg. 1.5)
1,873 (83.8%)
3 (0.1%)
Acronym Acronym
180
597 (avg. 3.3)
114 (63.3%)
3 (1.7%)
Armstrong Numbers Armstrong Numbers
169
429 (avg. 2.5)
137 (81.1%)
3 (1.8%)
Atbash Cipher Atbash Cipher
67
222 (avg. 3.3)
45 (67.2%)
0 (0.0%)
Binary Search Binary Search
29
90 (avg. 3.1)
20 (69.0%)
0 (0.0%)
Bob Bob
286
1,241 (avg. 4.3)
217 (75.9%)
27 (9.4%)
Clock Clock
20
57 (avg. 2.9)
8 (40.0%)
0 (0.0%)
Collatz Conjecture Collatz Conjecture
264
970 (avg. 3.7)
215 (81.4%)
26 (9.8%)
D&D Character D&D Character
60
240 (avg. 4.0)
35 (58.3%)
1 (1.7%)
Darts Darts
41
71 (avg. 1.7)
28 (68.3%)
2 (4.9%)
Difference of Squares Difference of Squares
561
1,401 (avg. 2.5)
485 (86.5%)
56 (10.0%)
ETL ETL
128
260 (avg. 2.0)
97 (75.8%)
4 (3.1%)
Eliud's Eggs Eliud's Eggs
18
17 (avg. 0.9)
12 (66.7%)
0 (0.0%)
Gigasecond Gigasecond
322
508 (avg. 1.6)
272 (84.5%)
32 (9.9%)
Grains Grains
1,252
3,931 (avg. 3.1)
757 (60.5%)
148 (11.8%)
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
17
45 (avg. 2.6)
9 (52.9%)
0 (0.0%)
Isogram Isogram
134
385 (avg. 2.9)
103 (76.9%)
5 (3.7%)
Leap Leap
676
1,545 (avg. 2.3)
598 (88.5%)
76 (11.2%)
List Ops List Ops
128
386 (avg. 3.0)
79 (61.7%)
5 (3.9%)
Nucleotide Count Nucleotide Count
131
297 (avg. 2.3)
107 (81.7%)
5 (3.8%)
Pangram Pangram
19
39 (avg. 2.1)
15 (78.9%)
0 (0.0%)
Protein Translation Protein Translation
20
50 (avg. 2.5)
12 (60.0%)
0 (0.0%)
Proverb Proverb
15
39 (avg. 2.6)
10 (66.7%)
0 (0.0%)
Queen Attack Queen Attack
6
5 (avg. 0.8)
3 (50.0%)
0 (0.0%)
RNA Transcription RNA Transcription
150
210 (avg. 1.4)
133 (88.7%)
6 (4.0%)
Raindrops Raindrops
138
336 (avg. 2.4)
118 (85.5%)
7 (5.1%)
Resistor Color Resistor Color
21
57 (avg. 2.7)
17 (81.0%)
2 (9.5%)
Resistor Color Duo Resistor Color Duo
18
39 (avg. 2.2)
13 (72.2%)
1 (5.6%)
Resistor Color Trio Resistor Color Trio
21
162 (avg. 7.7)
16 (76.2%)
2 (9.5%)
Reverse String Reverse String
316
386 (avg. 1.2)
237 (75.0%)
4 (1.3%)
Roman Numerals Roman Numerals
142
262 (avg. 1.8)
112 (78.9%)
6 (4.2%)
Scrabble Score Scrabble Score
215
484 (avg. 2.3)
185 (86.0%)
22 (10.2%)
Sieve Sieve
15
25 (avg. 1.7)
10 (66.7%)
0 (0.0%)
Space Age Space Age
19
17 (avg. 0.9)
10 (52.6%)
0 (0.0%)
Square Root Square Root
26
44 (avg. 1.7)
18 (69.2%)
1 (3.8%)
Strain Strain
18
26 (avg. 1.4)
13 (72.2%)
1 (5.6%)
Triangle Triangle
39
141 (avg. 3.6)
30 (76.9%)
0 (0.0%)
Two Fer Two Fer
662
2,174 (avg. 3.3)
497 (75.1%)
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
89
130 (avg. 1.5)
68 (76.4%)
0 (0.0%)
Alphametics Alphametics
28
235 (avg. 8.4)
8 (28.6%)
3 (10.7%)
Anagram Anagram
145
290 (avg. 2.0)
121 (83.4%)
9 (6.2%)
Circular Buffer Circular Buffer
12
17 (avg. 1.4)
3 (25.0%)
0 (0.0%)
Diamond Diamond
6
17 (avg. 2.8)
2 (33.3%)
0 (0.0%)
Food Chain Food Chain
6
66 (avg. 11.0)
2 (33.3%)
0 (0.0%)
Grade School Grade School
7
6 (avg. 0.9)
2 (28.6%)
0 (0.0%)
House House
26
66 (avg. 2.5)
14 (53.8%)
0 (0.0%)
Kindergarten Garden Kindergarten Garden
7
7 (avg. 1.0)
2 (28.6%)
0 (0.0%)
Knapsack Knapsack
8
14 (avg. 1.8)
4 (50.0%)
0 (0.0%)
Largest Series Product Largest Series Product
10
13 (avg. 1.3)
4 (40.0%)
0 (0.0%)
Matching Brackets Matching Brackets
114
567 (avg. 5.0)
88 (77.2%)
1 (0.9%)
Meetup Meetup
91
165 (avg. 1.8)
49 (53.8%)
5 (5.5%)
Pascal's Triangle Pascal's Triangle
9
15 (avg. 1.7)
4 (44.4%)
0 (0.0%)
Perfect Numbers Perfect Numbers
387
1,131 (avg. 2.9)
328 (84.8%)
40 (10.3%)
Phone Number Phone Number
110
212 (avg. 1.9)
84 (76.4%)
1 (0.9%)
Pig Latin Pig Latin
6
7 (avg. 1.2)
2 (33.3%)
0 (0.0%)
Robot Name Robot Name
170
470 (avg. 2.8)
106 (62.4%)
3 (1.8%)
Robot Simulator Robot Simulator
6
10 (avg. 1.7)
2 (33.3%)
0 (0.0%)
Rotational Cipher Rotational Cipher
15
21 (avg. 1.4)
9 (60.0%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
6
19 (avg. 3.2)
2 (33.3%)
0 (0.0%)
Say Say
66
159 (avg. 2.4)
42 (63.6%)
0 (0.0%)
Secret Handshake Secret Handshake
7
5 (avg. 0.7)
3 (42.9%)
0 (0.0%)
Spiral Matrix Spiral Matrix
7
24 (avg. 3.4)
3 (42.9%)
0 (0.0%)
Sublist Sublist
31
59 (avg. 1.9)
17 (54.8%)
2 (6.5%)
Twelve Days Twelve Days
52
194 (avg. 3.7)
34 (65.4%)
2 (3.8%)
Two Bucket Two Bucket
7
8 (avg. 1.1)
3 (42.9%)
0 (0.0%)
Word Count Word Count
130
260 (avg. 2.0)
102 (78.5%)
4 (3.1%)
Yacht Yacht
10
40 (avg. 4.0)
5 (50.0%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
10
14 (avg. 1.4)
3 (30.0%)
0 (0.0%)
Bank Account Bank Account
8
29 (avg. 3.6)
2 (25.0%)
0 (0.0%)
Luhn Luhn
12
24 (avg. 2.0)
5 (41.7%)
0 (0.0%)
Minesweeper Minesweeper
12
16 (avg. 1.3)
3 (25.0%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
10
69 (avg. 6.9)
5 (50.0%)
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
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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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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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Flatten Array Flatten Array
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Forth Forth
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Go Counting Go Counting
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Hangman Hangman
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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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Matrix Matrix
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Micro Blog Micro Blog
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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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Poker Poker
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POV POV
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Prime Factors Prime Factors
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Pythagorean Triplet Pythagorean Triplet
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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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REST API REST API
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Saddle Points Saddle Points
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Satellite Satellite
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Series Series
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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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Sum of Multiples Sum of Multiples
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Tournament Tournament
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Transpose Transpose
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Tree Building Tree Building
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Word Search Word Search
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Wordy Wordy
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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: 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
25,228
Test Run Pass Rate
39.2% (9883)
Test Run Fail Rate
57.8% (14590)
Test Run Error Rate
3.0% (755)

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.