A recruiter found me online and persuaded me to apply. I am generally good with algorithms; I use them literally every day.

There was an online tech interview with three questions, and I had 90 minutes to complete them. The questions were nothing too hard and very familiar.

I managed to complete them perfectly, but for some reason, I didn't advance to the next round.

PS: I've only posted the questions here because they are clearly looking for something more than just the solutions, perhaps coding style and other skills.

FizzBuzz

Luhn algorithm

String sanitiser routine.