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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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7 kyu
Find heavy ball - level: novice
1,530tiriana
Puzzles
Logic
Riddles
5 kyu
Find heavy ball - level: master
1,732tiriana
Puzzles
Logic
Riddles
7 kyu
Binary Addition
179,859garrettguy457
Binary
Fundamentals
Retired
Did I Finish my Sudoku? (retired)
15,659suuuzi
Mathematics
Puzzles
Games
Game Solvers
6 kyu
Utf-8: Binary Encoding
103chivery
Unicode
Strings
Algorithms
7 kyu
KanaKonverter I
194Kaiyou
Fundamentals
8 kyu
Is there a vowel in there?
14,695PG1
Fundamentals
Strings
Arrays
6 kyu
Closest String
61QKiryu
Algorithms
6 kyu
Smart Traffic Lights
764user2514386
Fundamentals
Object-oriented Programming
8 kyu
Will you make it?
148,019user2514386
Mathematics
Fundamentals
7 kyu
Make a square box!
1,839user2514386
Strings
Arrays
ASCII Art
Algorithms
6 kyu
Loose Change
5,753ghost_pilot
Mathematics
Fundamentals
6 kyu
Esolang: MiniBitMove
951user2514386
Interpreters
Strings
Arrays
Bits
Esoteric Languages
Fundamentals
7 kyu
21 Sticks
2,120user2514386
Games
Algorithms
Mathematics
Game Solvers
6 kyu
Esolang: Tick
911user2514386
Esoteric Languages
Interpreters
Strings
Arrays
Fundamentals
7 kyu
More than Zero?
2,696ethanhan2013
Debugging
7 kyu
Get the Middle Character
272,639Shivo
Fundamentals
Strings
7 kyu
Fizz Buzz
25,684stephenyu
Algorithms
Fundamentals
Arrays
6 kyu
Number Format
3,148cnawaraj
Regular Expressions
Fundamentals
6 kyu
Clock in Mirror
3,759aryan-firouzian
Fundamentals
7 kyu
Candy problem
5,454JustyFY
Lists
Algorithms
Draft
Tug-o'-War
1,680edm2410
Status:Draft
Estimated Rank:
7 kyu
Arrays
Fundamentals
7 kyu
Name Array Capping
7,516ogryzek
Strings
Arrays
Fundamentals
8 kyu
Fake Binary
146,892PG1
Fundamentals
Strings
Arrays
6 kyu
Detect Pangram
184,601anindyabd
Strings
Data Structures
Fundamentals
8 kyu
Counting sheep...
263,765tfKamran
Arrays
Fundamentals
7 kyu
Leap Years
40,249BattleRattle
Date Time
Algorithms
7 kyu
Naughty or Nice?
1,751user2514386
Mathematics
Fundamentals
7 kyu
Area of a Circle
12,199austinc
Fundamentals
Algorithms
Geometry
Mathematics
7 kyu
How much will you spend?
1,164user2514386
Mathematics
Algorithms
6 kyu
The Vowel Code
20,743yaphi1
Arrays
Strings
Regular Expressions
Fundamentals
5 kyu
Morse Encoding
1,230constablebrew
Bits
Strings
Binary
Parsing
Algorithms
7 kyu
Which color is the brightest?
5,688avermakov
Algorithms
Strings
3 kyu
Minimal Cost Binary Search Trees
84ecolban
Algorithms
Binary Search Trees
Fundamentals
7 kyu
Coloured Triangles
10,910Avanta
Logic
Strings
Algorithms
4 kyu
Mystery Function
2,152ecolban
Fundamentals
6 kyu
Backspaces in string
18,648vetalpaprotsky
Fundamentals
Strings
Algorithms
7 kyu
Adding Arrays
2,771K-Calderon-ASC
Fundamentals
6 kyu
The takeWhile Function
2,385jgdodson
Functional Programming
Arrays
Algorithms
Lists
Data Structures
7 kyu
All unique
12,646pinelopi
Algorithms
Strings
6 kyu
Even Fibonacci Sum
3,167krillgar
Algorithms
7 kyu
Sum of all arguments
11,566user578387
Fundamentals
6 kyu
Duplicate Encoder
222,897obnounce
Strings
Arrays
Fundamentals
Beta
Robust hangman
24davilla
Status:Waiting for issues to be resolved
Fundamentals
7 kyu
Reverse words
146,081jnicol
Strings
Fundamentals
6 kyu
Bouncing Balls
90,146g964
Puzzles
Algorithms
Mathematics
6 kyu
Find Numbers with Same Amount of Divisors
749raulbc777
Algorithms
Mathematics
Data Structures
Fundamentals
8 kyu
Reversed Strings
358,275jhoffner
Strings
Fundamentals
8 kyu
Beginner - Reduce but Grow
158,095PG1
Fundamentals
Arrays
Retired
N-th Power (retired)
35,399Milford
Fundamentals
Arrays
8 kyu
Find the position!
29,762iamchingel
Fundamentals
8 kyu
Playing with cubes II
7,981Jotha
Fundamentals
Object-oriented Programming
8 kyu
CSV representation of array
19,164Dmitry Kudla
Fundamentals
Arrays
Strings
8 kyu
L1: Set Alarm
102,045Swolebrain
Fundamentals
Logic
8 kyu
Regexp Basics - is it a digit?
16,373taw
Regular Expressions
Fundamentals
8 kyu
Compare within margin
15,245ITSOES
Fundamentals
Logic
8 kyu
Total amount of points
110,841petrosernivka
Fundamentals
Arrays
Strings
8 kyu
A wolf in sheep's clothing
35,547jkempster34
Fundamentals
Arrays
8 kyu
Pillars
27,302petrosernivka
Fundamentals
Mathematics
8 kyu
Enumerable Magic #20 - Cascading Subsets
8,310bellmyer
Fundamentals
Lists
Data Structures
Arrays
Algorithms
8 kyu
Bin to Decimal
32,421wichu
Binary
Fundamentals
8 kyu
OOP: Object Oriented Piracy
20,522By-The-Ocean
Object-oriented Programming
Fundamentals
8 kyu
Holiday VI - Shark Pontoon
17,407PG1
Fundamentals
Mathematics
3 kyu
The Lift
3,359dinglemouse
Algorithms
Queues
Data Structures
4 kyu
Sum of Intervals
38,889xDranik
Algorithms
Performance
6 kyu
Pascal's Triangle
11,601boatmeme
Arrays
Mathematics
Algorithms
5 kyu
Land perimeter
4,927St3f4n
Fundamentals
6 kyu
Square string tops
329dcieslak
Fundamentals
Strings
7 kyu
Factorial
28,516wichu
Fundamentals
6 kyu
Custom sort function
1,245lunitik
Sorting
Arrays
Algorithms
Restricted
5 kyu
Binary Tree Traversal
2,042Ban-Ath
Binary Trees
Trees
Recursion
Data Structures
Algorithms