
1. Currency

Solved by 89


2. Check if a number is prime

Solved by 657


3. Sum of every prime number below n

Solved by 490


4. Print every prime numbers in a range

Solved by 382


5. Next prime

Solved by 322


6. Reverse Roman Numerals

Solved by 457


7. Friday the 13th

Solved by 359


8. The missing card

Solved by 386


9. Playing with anagrams

Solved by 144


10. Flatten lists

Solved by 336


11. Perfect deck shuffle

Solved by 303


12. The Fibonacci sequence

Solved by 346


13. Hearts emojis

Solved by 250


14. Text framing

Solved by 53


15. Draw N Squares

Solved by 237


16. Pernicious numbers

Solved by 216


17. Side by side

Solved by 126


18. Largest product in a series

Solved by 169


19. Roman Numerals

Solved by 151


20. Caesar Cypher

Solved by 147


21. Longest Collatz sequence

Solved by 158


22. Largest product in a grid

Solved by 123


23. Break a safe

Solved by 153


24. Password Generator

Solved by 140


25. bencode / bdecode

Solved by 65


26. Py Master Mind

Solved by 80


27. Elementary cellular automaton

Solved by 59


28. Sequence Mining

Solved by 49


29. Change for 42€

Solved by 46


30. Pascal's triangle

Solved by 53


31. IRC logs as CSV

Solved by 31
