This math topic focuses on identifying and understanding improper fractions represented on number lines with even tick marks. The problems require naming the denominators of fractions based on the divisions of whole units on a number line. Each question presents a number line divided into various equal segments (e.g., halves, thirds, quarters, etc.), and the task is to identify what fraction each whole is split into. This topic is intended to enhance skills in visualizing and interpreting fractions on number lines.