Question 1
Rohit and Arjun are brothers. Rohit has 4 child/ren: Mateo, Hiroshi, Jennifer, Olga; Arjun has 4 child/ren: Evelyn, Nisha, Zara, Logan. How many first cousins does Olga have?
Olga's first cousins are the children of Arjun: Evelyn, Nisha, Zara, Logan → 4 cousins.