Leo thought for a moment. "Oh, I see! 5 plus 5 plus 5 equals 15!"
Leo jumped in surprise. "A talking mouse? Wow! Yes, Pip, I'm stuck on this apple problem."
Leo smiled and quickly wrote down the answer. He felt much more confident now. With Pip's help, he tackled the rest of the problems on the worksheet, one by one. They solved puzzles about toy cars, colorful marbles, and even a group of busy bees.