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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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6 kyu
hidden key
117matt c
Fundamentals
6 kyu
JS is Weird: Return a
523PG1
Strings
Fundamentals
5 kyu
JS is Weird: Return fuelstar
222PG1
Strings
Fundamentals
5 kyu
Fizz Buzz (with restrictions)
256suic
Restricted
Puzzles
5 kyu
Simple Time Bomb
2,335constablebrew
Reverse Engineering
Games
Puzzles
3 kyu
Defuse the bombs!
2,632Zyklus
Strings
Puzzles
Security
6 kyu
Don't rely on luck.
11,871JoshBrodieNZ
Games
Puzzles
1 kyu
Mystery function #2
174tianshuo
Algorithms
Puzzles
Security
Games
Mathematics
Bits
4 kyu
Regular expression for binary numbers divisible by 5
2,111aswitalski
Binary
Algorithms
Regular Expressions
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,081Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms