
1. Check if a number is prime

Solved by 435


2. Sum of every prime number below n

Solved by 307


3. Print every prime numbers in a range

Solved by 216


4. Next prime

Solved by 195


5. Reverse Roman Numerals

Solved by 356


6. Friday the 13th

Solved by 271


7. The missing card

Solved by 286


8. Playing with anagrams

Solved by 67


9. Flatten lists

Solved by 243


10. Perfect deck shuffle

Solved by 233


11. The Fibonacci sequence

Solved by 251


12. Hearts emojis

Solved by 202


13. Draw N Squares

Solved by 170


14. Pernicious numbers

Solved by 160


15. Side by side

Solved by 95


16. Largest product in a series

Solved by 117


17. Roman Numerals

Solved by 104


18. Caesar Cypher

Solved by 104


19. Longest Collatz sequence

Solved by 103


20. Largest product in a grid

Solved by 82


21. Break a safe

Solved by 91


22. Password Generator

Solved by 83


23. bencode / bdecode

Solved by 51


24. Py Master Mind

Solved by 56


25. Elementary cellular automaton

Solved by 46


26. Sequence Mining

Solved by 29


27. Change for 42€

Solved by 30


28. Pascal's triangle

Solved by 31


29. IRC logs as CSV

Solved by 18
