Counting & Permutations
Count arrangements using factorials, blocks, restrictions, repeated letters and ordered selections.
Ways to work on it
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Worksheet
Short questions you can check as you go, or print as a sheet with mark schemes.
Open the worksheet -
Practice
Exam-style questions with mark schemes, and a fresh set every time you ask.
Open practice questions -
Quiz
Fifteen questions that get harder as you go, marked as you answer.
Start the quiz