Hello, dh214!

Could you explain the problem, please?

Find the next larger permutation inlexicographic order??

after each of these permutations.

a) 1342

b) 13245

c) 1623547

d) 31528764

"Lexicographic" means "like a dictionary."

It sounds like we write out all the possible permutationsin words,

. . then list them in alphabetical order.

This is perhaps the silliest "math" problem ever!