Final answer:
The statement that best reveals the author's purpose to inform in The Number Devil is that there's an infinite number of numbers.
Step-by-step explanation:
The statement from The Number Devil that best reveals the author's purpose to inform is: "There's an infinite number of numbers." This statement provides factual information about the concept of infinity and highlights the educational nature of the book. By using the word "infinite," the author is emphasizing the vastness and limitless nature of numbers, which serves to inform the reader.
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