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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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4 kyu
Large Factorials
9,026matt c
Algorithms
Big Integers
6 kyu
A Rule of Divisibility by 13
15,566g964
Fundamentals
Algorithms
Mathematics
6 kyu
Which are in?
78,998g964
Arrays
Lists
Strings
Refactoring
6 kyu
Duplicate Encoder
217,877obnounce
Strings
Arrays
Fundamentals
4 kyu
Sortable Poker Hands
458FrankK
Games
Fundamentals
Sorting
Design Patterns
Algorithms
5 kyu
Molecule to atoms
5,845romanzes
Parsing
Algorithms
Strings
6 kyu
Convert string to camel case
188,766jhoffner
Regular Expressions
Algorithms
Strings
4 kyu
Magnet particules in boxes
7,576g964
Mathematics
Matrix
Algorithms
6 kyu
Kebabize
12,732user4316848
Fundamentals
Strings
Regular Expressions
5 kyu
String incrementer
48,011parceval
Regular Expressions
Strings
Retired
Did I Finish my Sudoku? (retired)
15,659suuuzi
Mathematics
Puzzles
Games
Game Solvers
5 kyu
Best travel
20,393g964
Fundamentals
8 kyu
Remove String Spaces
251,417PG1
Fundamentals
Strings
6 kyu
Playing with digits
136,325g964
Fundamentals
Mathematics
6 kyu
Your order, please
166,592iamstone
Strings
Fundamentals
6 kyu
Create Phone Number
327,691xDranik
Arrays
Strings
Regular Expressions
Algorithms
6 kyu
Bit Counting
238,948xcthulhu
Bits
Algorithms
7 kyu
Highest and Lowest
293,951Deantwo
Fundamentals
Strings
7 kyu
Disemvowel Trolls
350,399osuushi
Strings
Regular Expressions
Fundamentals
6 kyu
Array.diff
280,124marcinbunsch
Arrays
Fundamentals
Algorithms
4 kyu
Ranking Poker Hands
3,241FrankK
Games
Algorithms
Object-oriented Programming
6 kyu
Who likes it?
338,432BattleRattle
Strings
Fundamentals
5 kyu
Diophantine Equation
4,716g964
Fundamentals
Mathematics
Algebra
Retired
Vasya and System of Equations (retired)
646AlexIsHappy
Fundamentals
Mathematics
Algorithms
Logic
Numbers
Algebra
Puzzles
Games
7 kyu
How many Katas should I have done?
143Blune
Date Time
Fundamentals
4 kyu
Matrix Determinant
22,435pjfranzini
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
4 kyu
parseInt() reloaded
17,290BattleRattle
Parsing
Strings
Algorithms
2 kyu
Constructing a car #3 - On-Board Computer
58user5036852
Fundamentals
Object-oriented Programming
Logic
Data Structures
6 kyu
Hex class
1,164josher19
Algorithms
Parsing
Fundamentals
Object-oriented Programming
6 kyu
Encrypt this!
22,332suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security