since you like riddles as well, maybe you already know it , but still wanted to share this nice link too. https://projecteuler.net/ i'ts more about mathematical problems however...
RE: 🕵🕵🕵Hello Steemians you are incredible🔑🔑🔑
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🕵🕵🕵Hello Steemians you are incredible🔑🔑🔑