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Detective Nero Wolfe investigates the crime. The case involves 80 people, one of which is a criminal and another one is a witness (both are unknown). Each day detective may ...

Assume that if person A knows person B, then person B knows person A.

A group of $n$ people is called $(k,p)$-amicable, if for every group of ...

Solve this Kakuro puzzle, and add up the numbers where the blue mark is for your answer.

In a Parallel Universe, Alibaba is the leader of Forty Thieves. One day, the thieves found 100 golden coins. The Forty Thieves wanted 80 golden coins, but the greedy Alibaba ...

Congratulations! You just bought a brand new boat, and are planning on taking it on a two day fishing trip. You embark on your journey, and the first day goes ...

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