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A Story of how kings, hermits and numbers behave... A king became lost in a forest. He was found by a hermit who fed him and taught him...

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Goal: move the stack of discs from "source" peg to "target" peg Rules: a) move only one disc at time, b) never put bigger disc on top...

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What's a set? A set is just a collection of items... in the case above it's a mini steam engine, a mango and a padlock... And what's a...

How many combinations of 3 English letters exist? Any combination is fine, even if it's not a valid Engish word. So, "rkq" and "hhh" are...

How many ways to order 3 cards? Well, we can chose the ace first... that leaves us two choices for the second card, the 4 or the 9: So,...

Well, there are 52 cards in a deck, so there are 52 choices for the first card: Leaving 51 choices for the second card: And 50 choices...