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Train Now

Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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Ad
6 kyu
FIXME: Hello
2,479dinglemouse
Debugging
6 kyu
Address Book by State
1,309g964
Fundamentals
Strings
6 kyu
Card Games: Black Jack
270EricRamirezS
Games
Fundamentals
Algorithms
7 kyu
Laxative Shot Roulette
1,435tl123
Probability
Puzzles
Data Science
Statistics
4 kyu
Ranking Poker Hands
3,349FrankK
Games
Algorithms
Object-oriented Programming
8 kyu
What's up next?
6,021ExaStencil
Fundamentals
Data Structures
Logic
6 kyu
Simple Encryption #1 - Alternating Split
28,836user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
5 kyu
NSA Phone Tapping
322dnolan
Fundamentals
Object-oriented Programming
6 kyu
+1 Array
12,333khelmar
Fundamentals
Arrays
Algorithms
6 kyu
Merge in 2048
899mrfox
Games
Arrays
Algorithms
5 kyu
Ant Bridge
586dinglemouse
Algorithms
6 kyu
Matrix Addition
13,667xDranik
Matrix
Arrays
Algorithms
4 kyu
Human readable duration format
83,309davazp
Strings
Date Time
Algorithms
4 kyu
Strip Comments
52,950jhoffner
Strings
Algorithms
5 kyu
ISBN-10 Validation
10,604nklein
Regular Expressions
Algorithms
5 kyu
Count IP Addresses
28,830xDranik
Algorithms
6 kyu
The Deaf Rats of Hamelin
6,598dinglemouse
Fundamentals
Strings
Algorithms
Queues
Data Structures
3 kyu
How many are smaller than me II?
2,520joh_pot
Algorithms
Performance
6 kyu
Rotation Cipher Cracker
836NicholasSeward
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
nth Floyd line
1,050kodejuice
Mathematics
Puzzles
Fundamentals
5 kyu
Bananas
1,070dinglemouse
Strings
Algorithms
6 kyu
String array duplicates
7,923KenKamau
Strings
Arrays
Algorithms
6 kyu
Hollow array
724aweleshetu
Arrays
Fundamentals
5 kyu
A Brave New Wordle
311photo-pizza-importance
Algorithms
Strings
Puzzles
7 kyu
Digital cypher vol 2
3,205dcieslak
Fundamentals
Ciphers
Cryptography
6 kyu
Ping Pong
599dinglemouse
Algorithms
7 kyu
Rotate for a Max
10,871g964
Algorithms
6 kyu
Group in 10s
998matthewglover
Arrays
Lists
Fundamentals
6 kyu
80's Kids #7: She's a Small Wonder
2,162NateBrady23
Fundamentals
Object-oriented Programming
7 kyu
Smoking Timmy
906phju
Algorithms
Fundamentals
7 kyu
Reduce My Fraction
3,817SavageWilliam
Fundamentals
Recursion
Algorithms
6 kyu
Who won the election?
3,492SithFire
Algorithms
Lists
Fundamentals
6 kyu
Add All
942sazzadshopno
Fundamentals
Mathematics
6 kyu
Versions manager
1,685bedis-elacheche
Algorithms
Arrays
Strings
Object-oriented Programming
6 kyu
Separate The Wheat From The Chaff
1,720MrZizoScream
Fundamentals
Arrays
Performance
6 kyu
Financing a purchase
915g964
Fundamentals
Mathematics
7 kyu
Alphabetical Grid
1,593Djacon
Fundamentals
Algorithms
7 kyu
Minimum Perimeter of a Rectangle
1,213Kinto
Fundamentals
Algorithms
6 kyu
Positions Average
3,711g964
Fundamentals
Strings
6 kyu
Is a number prime?
113,104arithmetric
Mathematics
Algorithms
6 kyu
Where is my parent!?(cry)
6,978smolen
Fundamentals
5 kyu
Calculating with Functions
82,723BattleRattle
Functional Programming
6 kyu
Non-even substrings
1,508KenKamau
Strings
Fundamentals
6 kyu
Prime Factors
3,465kgashok
Algorithms
6 kyu
The Supermarket Queue
52,153mattlub
Arrays
Fundamentals
6 kyu
Elimination Tournament
1,091JOLee83
Arrays
Fundamentals
Algorithms
6 kyu
Unknown amount of duplicates. One missing number.
1,147raulbc777
Fundamentals
Mathematics
Arrays
Algorithms
Sorting
Performance
6 kyu
Car Number Plate Calculator
1,542W_2004
Algorithms
Logic
Mathematics
Fundamentals
6 kyu
Vowels Back
1,708PG1
Fundamentals
Strings
Arrays
Algorithms
6 kyu
Statistics for an Athletic Association
10,550g964
Fundamentals
Strings
Statistics
Mathematics
Data Science
6 kyu
Diagnosing Hypertension
368GitQuick
Strings
Arrays
Fundamentals
6 kyu
Back and forth then Reverse!
1,829RNOH
Algorithms
Performance
Arrays
6 kyu
FIRE and FURY
1,183dinglemouse
Regular Expressions
Strings
Algorithms
7 kyu
String doubles
2,865KenKamau
Strings
Algorithms
5 kyu
What doesn't belong to these?
208user5036852
Mathematics
Arrays
Puzzles
Algorithms
6 kyu
Help Mrs Jefferson
1,088raulbc777
Fundamentals
Data Structures
Arrays
Mathematics
5 kyu
Closest and Smallest
3,240g964
Fundamentals
Sorting
5 kyu
Lazy Repeater
7,577nklein
Iterators
Algorithms
6 kyu
Pokemon Damage Calculator
4,155yaphi1
Arrays
Games
Strings
Puzzles
7 kyu
Sort rectangles and circles by area II
2,528JohanWiltink
Fundamentals
Algorithms
Sorting
Mathematics
Geometry
6 kyu
Buying a car
17,936g964
Fundamentals
Mathematics
5 kyu
Rotate an array matrix
2,325jnicol
Matrix
Arrays
Algorithms
6 kyu
Millipede of words
876RealSup
Algorithms
Arrays
Strings
6 kyu
Function composition
9,183matthewglover
Functional Programming
Fundamentals
7 kyu
Grid index
1,949topping
Lists
Fundamentals
6 kyu
Olympiad podium
124ostaladaFab
Algorithms
6 kyu
Card game
453Dmitry Kudla
Algorithms
Games
Strings
6 kyu
Checkered Board
1,601Katbow
Strings
ASCII Art
Fundamentals
6 kyu
Zeros and Ones
793kodejuice
Puzzles
Logic
Algorithms
7 kyu
Next Element Generator
264chronikum
Algorithms
Arrays
Iterators
Fundamentals
7 kyu
Strange principal
1,344bereket2015
Mathematics
Algorithms
Fundamentals
5 kyu
PaginationHelper
40,405jhoffner
Object-oriented Programming
Arrays
Algorithms
6 kyu
Crashing Boxes
469marbiru
Fundamentals
7 kyu
Sums of consecutive integers
1,764andrewferk
Mathematics
Algorithms
6 kyu
Cylon Evolution
2,061opheliasdaisies
Object-oriented Programming
Fundamentals
5 kyu
Basic Nico variation
1,126dcieslak
Ciphers
Strings
Fundamentals
6 kyu
up AND down
3,042g964
Fundamentals
Strings
6 kyu
Bracket Duplicates
977jpchou
Strings
Regular Expressions
Algorithms
7 kyu
Honey to the Bee
2,578yorky001
Debugging
Object-oriented Programming