This topic focuses on division-based problem-solving, specifically identifying remainders when dividing a set number of items among a specified group size. Aimed at beginners, it employs a practical scenario where riders are distributed evenly across a given number of cars, and learners need to determine how many riders remain undistributed. Each question involves a single-digit divisor, reinforcing the fundamental concept of division and remainders within a real-world context. This topic serves as part of an introductory unit on long division.