This Application Problem is a part of the Lesson 4, Unit 3, Grade 1. This problem directly applies students' learning from Lesson 3 as students use indirect comparison to compare distances. For many students, such problems can be challenging to visualize on the first read. Joe ran a string from his room to his sister's room to measure the distance between them. When he tried to use the same string to measure the distance from his room to his brother's room, the string didn't reach! Which room was closer to Joe's room, his sister's or his brother's?