This guide will provide step-by-step instructions on how to complete all Duel Quiz given at Duel School (Duel Trials). Rewards include Gems and some cards for Quiz for beginners. New Quiz are added with each box release, averaging about 2 new Quiz (worth 30 Gems) a month. Aside from occasional Quiz events, there is no expiration date for Quiz.
When solving a Duel Quiz, you have access to see all aspects of the field: your opponent's deck, hand, and cards placed in their Spell/Trap Card area, as well as the deck your own. You must win the duel on your turn, or you will fail the test.
Following each step to complete the Quiz is simple enough, but I've included some notes where relevant.