Puzzles Name Solved By Palindromic Primes 19 Caesar Cipher 16 Triangular Number Sum 15 Fibonacci Numbers 13 Perfect Multiples 13 Letter Frequency 13 Square Numbers 13 Caeser Cipher II 13 The Eight Queens 12 The Truck Driver 12 Christmas Day 3000 12 The Josephus Problem 12 Fizz Buzz Bizz Fuzz 12 Canoe or Dinghy? 11 Consecutive Prime Digits 11 Mersenne Prime 11 Hexadecimal Representations 11 Look and Say Sequence 11 The Open Golf Challenge 10 Increasing Digits 10 Champernowne Constant 9 HQ9+ 9 The Troublesome Eight 8 Number Sequence 8 Base 36 8 Total Area 8 Magic Square 7 Flight Times 7 To Be Or Not To Be 7 Amicable Numbers 7 10 Factors 6 Shorthand 6 Excluded Letters 6 Brainf**k 5 Langton’s Ant 5 Fibonacci Primes 5 Square Triangles 5 64 bits won’t save you! 4 Monday 1st January 4 Removing Digits 4 The Magic 7 4 Searching Latin 4 The Reddo 3 100% Attitude 2 Lexicographic Permutations 2 Winning Wimbledon 1 Share this:TwitterFacebookLike this:Like Loading...