
1. Check if a number is prime

Solved by 393


2. Sum of every prime number below n

Solved by 274


3. Print every prime numbers in a range

Solved by 193


4. Next prime

Solved by 176


5. Reverse Roman Numerals

Solved by 340


6. Friday the 13th

Solved by 257


7. The missing card

Solved by 270


8. Playing with anagrams

Solved by 54


9. Flatten lists

Solved by 230


10. Perfect deck shuffle

Solved by 221


11. The Fibonacci sequence

Solved by 233


12. Hearts emojis

Solved by 191


13. Draw N Squares

Solved by 156


14. Pernicious numbers

Solved by 147


15. Side by side

Solved by 88


16. Largest product in a series

Solved by 104


17. Roman Numerals

Solved by 95


18. Caesar Cypher

Solved by 97


19. Longest Collatz sequence

Solved by 94


20. Largest product in a grid

Solved by 74


21. Break a safe

Solved by 84


22. Password Generator

Solved by 72


23. bencode / bdecode

Solved by 48


24. Py Master Mind

Solved by 54


25. Elementary cellular automaton

Solved by 44


26. Sequence Mining

Solved by 28


27. Change for 42€

Solved by 28


28. Pascal's triangle

Solved by 28


29. IRC logs as CSV

Solved by 16
