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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
1,525tiriana
Puzzles
Logic
Riddles
5 kyu
Find heavy ball - level: master
1,730tiriana
Puzzles
Logic
Riddles
7 kyu
Binary Addition
178,141garrettguy457
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
193Kaiyou
Fundamentals
8 kyu
Is there a vowel in there?
14,214PG1
Fundamentals
Strings
Arrays
6 kyu
Closest String
61QKiryu
Algorithms
6 kyu
Smart Traffic Lights
733user2514386
Fundamentals
Object-oriented Programming
8 kyu
Will you make it?
146,316user2514386
Mathematics
Fundamentals
7 kyu
Make a square box!
1,819user2514386
Strings
Arrays
ASCII Art
Algorithms
6 kyu
Loose Change
5,725ghost_pilot
Mathematics
Fundamentals
6 kyu
Esolang: MiniBitMove
945user2514386
Interpreters
Strings
Arrays
Bits
Esoteric Languages
Fundamentals
7 kyu
21 Sticks
2,105user2514386
Games
Algorithms
Mathematics
Game Solvers
6 kyu
Esolang: Tick
906user2514386
Esoteric Languages
Interpreters
Strings
Arrays
Fundamentals
7 kyu
More than Zero?
2,661ethanhan2013
Debugging
7 kyu
Get the Middle Character
270,580Shivo
Fundamentals
Strings
7 kyu
Fizz Buzz
25,397stephenyu
Algorithms
Fundamentals
Arrays
6 kyu
Number Format
3,111cnawaraj
Regular Expressions
Fundamentals
6 kyu
Clock in Mirror
3,740aryan-firouzian
Fundamentals
7 kyu
Candy problem
5,390JustyFY
Lists
Algorithms
Draft
Tug-o'-War
1,680edm2410
Status:Draft
Estimated Rank:
7 kyu
Arrays
Fundamentals
7 kyu
Name Array Capping
7,481ogryzek
Strings
Arrays
Fundamentals
8 kyu
Fake Binary
145,263PG1
Fundamentals
Strings
Arrays
6 kyu
Detect Pangram
182,779anindyabd
Strings
Data Structures
Fundamentals
8 kyu
Counting sheep...
260,916tfKamran
Arrays
Fundamentals
7 kyu
Leap Years
40,023BattleRattle
Date Time
Algorithms
7 kyu
Naughty or Nice?
1,746user2514386
Mathematics
Fundamentals
7 kyu
Area of a Circle
11,922austinc
Fundamentals
Algorithms
Geometry
Mathematics
7 kyu
How much will you spend?
1,157user2514386
Mathematics
Algorithms
6 kyu
The Vowel Code
20,572yaphi1
Arrays
Strings
Regular Expressions
Fundamentals
5 kyu
Morse Encoding
1,230constablebrew
Bits
Strings
Binary
Parsing
Algorithms
7 kyu
Which color is the brightest?
5,684avermakov
Algorithms
Strings
3 kyu
Minimal Cost Binary Search Trees
83ecolban
Algorithms
Binary Search Trees
Fundamentals
7 kyu
Coloured Triangles
10,854Avanta
Logic
Strings
Algorithms
4 kyu
Mystery Function
2,129ecolban
Fundamentals
6 kyu
Backspaces in string
18,477vetalpaprotsky
Fundamentals
Strings
Algorithms
7 kyu
Adding Arrays
2,758K-Calderon-ASC
Fundamentals
6 kyu
The takeWhile Function
2,372jgdodson
Functional Programming
Arrays
Algorithms
Lists
Data Structures
7 kyu
All unique
12,517pinelopi
Algorithms
Strings
6 kyu
Even Fibonacci Sum
3,091krillgar
Algorithms
7 kyu
Sum of all arguments
11,532user578387
Fundamentals
6 kyu
Duplicate Encoder
221,218obnounce
Strings
Arrays
Fundamentals
Beta
Robust hangman
24davilla
Status:Waiting for issues to be resolved
Fundamentals
7 kyu
Reverse words
143,722jnicol
Strings
Fundamentals
6 kyu
Bouncing Balls
89,486g964
Puzzles
Algorithms
Mathematics
6 kyu
Find Numbers with Same Amount of Divisors
746raulbc777
Algorithms
Mathematics
Data Structures
Fundamentals
8 kyu
Reversed Strings
354,493jhoffner
Strings
Fundamentals
8 kyu
Beginner - Reduce but Grow
156,155PG1
Fundamentals
Arrays
Retired
N-th Power (retired)
35,399Milford
Fundamentals
Arrays
8 kyu
Find the position!
29,423iamchingel
Fundamentals
8 kyu
Playing with cubes II
7,762Jotha
Fundamentals
Object-oriented Programming
8 kyu
CSV representation of array
18,913Dmitry Kudla
Fundamentals
Arrays
Strings
8 kyu
L1: Set Alarm
100,742Swolebrain
Fundamentals
Logic
8 kyu
Regexp Basics - is it a digit?
16,244taw
Regular Expressions
Fundamentals
8 kyu
Compare within margin
15,032ITSOES
Fundamentals
Logic
8 kyu
Total amount of points
109,739petrosernivka
Fundamentals
Arrays
Strings
8 kyu
A wolf in sheep's clothing
35,274jkempster34
Fundamentals
Arrays
8 kyu
Pillars
27,052petrosernivka
Fundamentals
Mathematics
8 kyu
Enumerable Magic #20 - Cascading Subsets
8,086bellmyer
Fundamentals
Lists
Data Structures
Arrays
Algorithms
8 kyu
Bin to Decimal
32,001wichu
Binary
Fundamentals
8 kyu
OOP: Object Oriented Piracy
20,282By-The-Ocean
Object-oriented Programming
Fundamentals
8 kyu
Holiday VI - Shark Pontoon
17,305PG1
Fundamentals
Mathematics
3 kyu
The Lift
3,333dinglemouse
Algorithms
Queues
Data Structures
4 kyu
Sum of Intervals
38,552xDranik
Algorithms
Performance
6 kyu
Pascal's Triangle
11,536boatmeme
Arrays
Mathematics
Algorithms
5 kyu
Land perimeter
4,826St3f4n
Fundamentals
6 kyu
Square string tops
326dcieslak
Fundamentals
Strings
7 kyu
Factorial
26,874wichu
Fundamentals
6 kyu
Custom sort function
1,242lunitik
Sorting
Arrays
Algorithms
Restricted
5 kyu
Binary Tree Traversal
1,992Ban-Ath
Binary Trees
Trees
Recursion
Data Structures
Algorithms