Is it a:
Reluctantly, Andrei opened the file. The first page was a sea of integrals and geometry problems. He nearly closed it—but problem 17 caught his eye: “A shepherd sees 10 sheep jump over a fence. Each jump halves the distance to the moon. After how many jumps do the sheep land?” Culegere Matematica Petrica.pdf
Problems are typically arranged from simple exercises to challenging problems, allowing students to build confidence gradually. Is it a: Reluctantly, Andrei opened the file