Permutations vs Combinations:
Permutations and combinations are concepts in mathematics used to count arrangements. Permutations consider order—changing the order creates a different outcome. For example, ABC and BAC are different permutations. Combinations ignore order—ABC, BAC, and CAB are considered the same. These are useful in probability and decision-making problems.

Who Invented Homework:
Homework is often credited to Roberto Nevilis, an Italian teacher from the early 1900s. He supposedly assigned homework as a punishment, though historical evidence is limited.