Question 1
John and Isabella are siblings. John has 2 child/ren: Chen, Aarav; Isabella has 2 child/ren: Sachin, Mary. How many cross-cousins does Aarav have? (Cross-cousins are children of mother's brother or father's sister)
Aarav is child of John (father's side), so cross-cousins are children of his father's sister Isabella: 2 cousins.