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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
3,364
Submissions
28,693
Mentoring Discussions
642

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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: 3f04898da68161dbd6aa391bcd23bd747133bb5b (Updates should be instant)

Next goal: Implement 129 practice exercises. Find out more.
78 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello World Hello World
2,416
3,605 (avg. 1.5)
2,015 (83.4%)
3 (0.1%)
Acronym Acronym
282
833 (avg. 3.0)
144 (51.1%)
5 (1.8%)
Armstrong Numbers Armstrong Numbers
206
502 (avg. 2.4)
157 (76.2%)
4 (1.9%)
Atbash Cipher Atbash Cipher
85
289 (avg. 3.4)
54 (63.5%)
1 (1.2%)
Binary Search Binary Search
45
150 (avg. 3.3)
30 (66.7%)
1 (2.2%)
Bob Bob
302
1,393 (avg. 4.6)
228 (75.5%)
27 (8.9%)
Clock Clock
33
102 (avg. 3.1)
16 (48.5%)
1 (3.0%)
Collatz Conjecture Collatz Conjecture
284
1,073 (avg. 3.8)
231 (81.3%)
27 (9.5%)
D&D Character D&D Character
71
271 (avg. 3.8)
43 (60.6%)
1 (1.4%)
Darts Darts
52
115 (avg. 2.2)
40 (76.9%)
3 (5.8%)
Difference of Squares Difference of Squares
575
1,456 (avg. 2.5)
498 (86.6%)
56 (9.7%)
ETL ETL
135
295 (avg. 2.2)
102 (75.6%)
4 (3.0%)
Eliud's Eggs Eliud's Eggs
57
115 (avg. 2.0)
51 (89.5%)
0 (0.0%)
Gigasecond Gigasecond
328
519 (avg. 1.6)
277 (84.5%)
32 (9.8%)
Grains Grains
1,258
3,941 (avg. 3.1)
763 (60.7%)
148 (11.8%)
Grep Grep
98
233 (avg. 2.4)
56 (57.1%)
3 (3.1%)
Hamming Hamming
277
629 (avg. 2.3)
229 (82.7%)
24 (8.7%)
High Scores High Scores
22
48 (avg. 2.2)
12 (54.5%)
0 (0.0%)
Isogram Isogram
140
393 (avg. 2.8)
109 (77.9%)
5 (3.6%)
Leap Leap
685
1,565 (avg. 2.3)
606 (88.5%)
76 (11.1%)
List Ops List Ops
136
411 (avg. 3.0)
85 (62.5%)
6 (4.4%)
Nth Prime Nth Prime
8
28 (avg. 3.5)
5 (62.5%)
0 (0.0%)
Nucleotide Count Nucleotide Count
134
301 (avg. 2.2)
110 (82.1%)
5 (3.7%)
Pangram Pangram
24
48 (avg. 2.0)
20 (83.3%)
0 (0.0%)
Protein Translation Protein Translation
23
55 (avg. 2.4)
15 (65.2%)
0 (0.0%)
Proverb Proverb
17
41 (avg. 2.4)
12 (70.6%)
0 (0.0%)
Queen Attack Queen Attack
10
24 (avg. 2.4)
6 (60.0%)
0 (0.0%)
RNA Transcription RNA Transcription
156
218 (avg. 1.4)
139 (89.1%)
6 (3.8%)
Raindrops Raindrops
141
341 (avg. 2.4)
121 (85.8%)
7 (5.0%)
Resistor Color Resistor Color
27
78 (avg. 2.9)
22 (81.5%)
2 (7.4%)
Resistor Color Duo Resistor Color Duo
20
43 (avg. 2.2)
15 (75.0%)
1 (5.0%)
Resistor Color Trio Resistor Color Trio
24
176 (avg. 7.3)
18 (75.0%)
2 (8.3%)
Reverse String Reverse String
318
392 (avg. 1.2)
240 (75.5%)
4 (1.3%)
Roman Numerals Roman Numerals
146
271 (avg. 1.9)
116 (79.5%)
6 (4.1%)
Scrabble Score Scrabble Score
219
490 (avg. 2.2)
189 (86.3%)
22 (10.0%)
Sieve Sieve
20
52 (avg. 2.6)
15 (75.0%)
0 (0.0%)
Space Age Space Age
23
22 (avg. 1.0)
14 (60.9%)
0 (0.0%)
Square Root Square Root
30
46 (avg. 1.5)
20 (66.7%)
1 (3.3%)
Strain Strain
21
31 (avg. 1.5)
16 (76.2%)
1 (4.8%)
Triangle Triangle
45
179 (avg. 4.0)
34 (75.6%)
0 (0.0%)
Two Fer Two Fer
665
2,186 (avg. 3.3)
501 (75.3%)
97 (14.6%)
Affine Cipher Affine Cipher
89
398 (avg. 4.5)
50 (56.2%)
3 (3.4%)
All Your Base All Your Base
229
510 (avg. 2.2)
116 (50.7%)
3 (1.3%)
Allergies Allergies
94
137 (avg. 1.5)
72 (76.6%)
0 (0.0%)
Alphametics Alphametics
30
241 (avg. 8.0)
9 (30.0%)
4 (13.3%)
Anagram Anagram
149
295 (avg. 2.0)
125 (83.9%)
10 (6.7%)
Circular Buffer Circular Buffer
16
18 (avg. 1.1)
4 (25.0%)
0 (0.0%)
Diamond Diamond
8
19 (avg. 2.4)
4 (50.0%)
0 (0.0%)
Food Chain Food Chain
7
67 (avg. 9.6)
3 (42.9%)
0 (0.0%)
Grade School Grade School
9
8 (avg. 0.9)
4 (44.4%)
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
12
24 (avg. 2.0)
8 (66.7%)
0 (0.0%)
Largest Series Product Largest Series Product
10
13 (avg. 1.3)
4 (40.0%)
0 (0.0%)
Matching Brackets Matching Brackets
129
710 (avg. 5.5)
100 (77.5%)
2 (1.6%)
Meetup Meetup
93
166 (avg. 1.8)
49 (52.7%)
5 (5.4%)
Pascal's Triangle Pascal's Triangle
13
21 (avg. 1.6)
7 (53.8%)
0 (0.0%)
Perfect Numbers Perfect Numbers
388
1,132 (avg. 2.9)
329 (84.8%)
40 (10.3%)
Phone Number Phone Number
112
215 (avg. 1.9)
85 (75.9%)
1 (0.9%)
Pig Latin Pig Latin
7
10 (avg. 1.4)
3 (42.9%)
0 (0.0%)
Robot Name Robot Name
171
473 (avg. 2.8)
108 (63.2%)
3 (1.8%)
Robot Simulator Robot Simulator
9
15 (avg. 1.7)
4 (44.4%)
0 (0.0%)
Rotational Cipher Rotational Cipher
17
24 (avg. 1.4)
10 (58.8%)
0 (0.0%)
Run-Length Encoding Run-Length Encoding
9
30 (avg. 3.3)
5 (55.6%)
0 (0.0%)
Say Say
66
159 (avg. 2.4)
42 (63.6%)
0 (0.0%)
Secret Handshake Secret Handshake
8
7 (avg. 0.9)
4 (50.0%)
0 (0.0%)
Spiral Matrix Spiral Matrix
8
24 (avg. 3.0)
3 (37.5%)
0 (0.0%)
Sublist Sublist
32
67 (avg. 2.1)
18 (56.3%)
2 (6.3%)
Twelve Days Twelve Days
53
195 (avg. 3.7)
34 (64.2%)
2 (3.8%)
Two Bucket Two Bucket
9
27 (avg. 3.0)
4 (44.4%)
0 (0.0%)
Word Count Word Count
131
263 (avg. 2.0)
103 (78.6%)
4 (3.1%)
Yacht Yacht
10
40 (avg. 4.0)
5 (50.0%)
0 (0.0%)
Zebra Puzzle Zebra Puzzle
10
15 (avg. 1.5)
3 (30.0%)
0 (0.0%)
Bank Account Bank Account
11
35 (avg. 3.2)
3 (27.3%)
0 (0.0%)
Luhn Luhn
15
28 (avg. 1.9)
7 (46.7%)
0 (0.0%)
Minesweeper Minesweeper
13
28 (avg. 2.2)
4 (30.8%)
0 (0.0%)
Parallel Letter Frequency Parallel Letter Frequency
11
69 (avg. 6.3)
5 (45.5%)
0 (0.0%)
Variable Length Quantity Variable Length Quantity
55
171 (avg. 3.1)
23 (41.8%)
2 (3.6%)
1 deprecated practice exercises
Started
Attempts
Completions
Mentoring requests
Accumulate Accumulate
5
6 (avg. 1.2)
3 (60.0%)
1 (20.0%)
51 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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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: 6ed2b5f4ae1fe185bc5413269e740868d986fcfd (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
27,130
Test Run Pass Rate
39.2% (10643)
Test Run Fail Rate
57.8% (15669)
Test Run Error Rate
3.0% (818)

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.