Permutations without repeats are simple, but let’s go through a couple more examples to make sure you’re confident with them! This is part of the Prelim Maths Extension 1 Syllabus from the topic Combinatorics: Working with Combinatorics. In this post, we will explore Permutations and combinations permutations without repeats. Here we will learn to solve problems involving permutations and restrictions with or without repeated objects.