IKMC 2027 - Grades 7-8 - Self-study SET 4 - Thematic Batch 3 Question 21

A class contains four pairs of twins. One day, 85 people, consisting of all the students and their parents, attend a school festival. Every student is accompanied by both parents. How many students are in the class?

Editorial note: As intended in the source, only the four twin pairs share parents within the class; there are no other sibling pairs.