How to get questions in random manner pls help

Hi Koders!
I’m new to kodular i have developed offline quiz app from free aia file available online.
which having 5 questions (but i can add morethan 50 questions) when next button clicked i want questions to be shown randomly rather than orderly and also not to repeat same question again in a particular session pls help me on what to add or alter get qustions randomly and not to get question repeatedly…
Relevant Blocks attached for ur reference.