In the CAT exam, the concepts of permutations and combinations play a significant role in assessing a candidate's problem-solving abilities and logical reasoning skills.

Safe combinations are permutations because the order of the numbers matters to open the safe. An anagram where different words come from the same root word is another example.

Mystery Math Whiz and Novelist Advance Permutation Problem A new proof from the Australian science fiction writer Greg Egan and a 2011 proof anonymously posted online are now being hailed as ...