Here are 5 of the Top 20 toughest questions asked of Christians with the respective answers
1. WHY CAN’T EVOLUTION BE TRUE? 2. WHEN WE DIE WE JUST CEASE TO EXIST! 3. PROVE TO ME GOD EXISTS? 4. ONLY IF I SEE GOD WILL I BELIEVE?! 5. WHY DOESN’T GOD SHOW HIMSELF PHYSICALLY?
https://www.nakedlife.org/doc/25-toughest-questions-for-christians
https://heavenscatalyst.org/truth/hardest-christian-questions/