The Reddo


The Reddo is a new currency, which comes in coin denominations of all the prime numbers less than twenty. For example, 10 Reddos can be made with five combinations of coins:

  • 2 Reddos + 2 Reddos + 2 Reddos + 2 Reddos + 2 Reddos
  • 3 Reddos + 3 Reddos + 2 Reddos + 2 Reddos
  • 5 Reddos + 3 Reddos + 2 Reddos
  • 5 Reddos + 5 Reddos
  • 7 Reddos + 3 Reddos

Find the number of combinations in which 50 Reddos can be made.

Remember, to solve this puzzle and appear on the leaderboard, email both your solution and your source code (in any language) to lewiscornwall13@gmail.com. Good luck!!

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