http://www.newsweek.com/yugioh-duel-links-duelist-challenge-solutions-1190020

Duelists Challenges have returned to Yu-Gi-Oh! Duel Links , and with it more chances for players to earn Gems and cards.

Starting Oct. 26, Duelist Challenge quizzes will be available to solve, each giving a specific reward for completing. The first two quizzes have dropped, with one more Duelist Challenge opening every day until Oct. 29. There are five Duelist Challenges in total this time around, and Duel Links players will want to solve them all for the Gems and rare cards, like Magic Planter.