Petya paused. "But the problems are so hard! I just want to finish my homework and play football."
The textbook was famous for its tricky problems. It didn't just ask "What is 5 times 5?" Instead, it asked Petya to imagine three trains leaving different stations at prime-numbered intervals while balancing a budget for a fictional village. matematika arginskaia 4 klass reshebnik skachat
As he hovered his mouse over a glowing "Download" button on a mysterious website, the lamp on his desk began to flicker. Suddenly, a tiny, translucent figure emerged from the pages of his book. It was the , wearing a graduation cap and holding a wooden ruler. Petya paused