Since you didn't specify a specific (e.g., "number 45" or "page 12"), I have written a story about a student named Maxim who is trying to solve a tricky problem from that exact textbook by V.N. Rudnitskaya and T.V. Yudacheva . The Mystery of the Missing Train
"Problem number 15," he whispered. "A train leaves Station A at 8:00 AM traveling at 60 km/h..." Since you didn't specify a specific (e
"Two hours!" Maxim shouted over the roar of the engine. "They will meet in exactly two hours, at 10:00 AM!" "number 45" or "page 12")