How do I Get Rid of Duplicates for Random Number Generator?

Hello all,

Doing some cleanup up my game and I want to remove duplicate numbers in the practice section of the game. Currently I use this to get my random answers for the player to choose from. This works great for what I need but give duplicates from time to time. Is there a good way to get rid of the duplicates?

Thanks for any help,

Rich

PERMUTATION TABLES

construct.net/en/make-games/manuals/construct-3/plugin-reference/advanced-random