Random display a subset of question library

[dmtk41]

Thank you @Yaw, @Xiphware
The Randomization of questions - #4 by yanokwa is close to the approach that I'm looking for. I did read this topic before but I stuck at preventing the random function generate duplicate number so potentially specific question maybe appear several times. Pls see my attached form.sample.xlsx (14.8 KB)
I found this thread about de-duplicate but look like it not work.

Random number without duplicates/without replacement

Dear all, I need to sample 20 households based on a household list. I was thinking I could sample them using ODK and the household rank number. Hence, I was looking for a way to generate 20 random numbers on ODK. I did the following 1+int(once(random())*${total number of households in the village}) but this give me a random number with replacement and hence possibly with duplicates. I am looking to a way to do the same without replacement. Any idea? Thanks

The Randomization of questions - #4 by yanokwa and randomly presented/sorted is also interesting me and I'm looking at them. I think I need it.