Synthesized answer
The provided passages do not contain information about what questions remain unanswered in the book "How to Solve It."
The passages describe the book as a guide that shows readers how to think straight and attack any problem that can be reasoned out, using mathematical methods [1, 2]. It includes a heuristic dictionary to make problems more manageable and aims to harness curiosity and inventive faculties [2]. The book is praised for its instructions on stripping away irrelevancies and going to the heart of a problem [1, 2].
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: How to solve it by George Pólya Description: A perennial bestseller by eminent mathematician G. Polya, How to Solve It will show anyone in any field how to think straight. In lucid and appealing prose, Polya reveals how the mathematical method of demonstrating a proof or finding an unknown can be of help in attacking any problem that can be “reasoned” out—from building a bridge to winning a game of anagrams. Generations of readers have relished Polya’s deft—indeed, brilliant—instructions on stripping away irrelevancies and going straight to the heart of the problem. --- Google Books…
How to Solve It includes a heuristic dictionary with dozens of entries on how to make problems more manageable—from analogy and induction to the heuristic method of starting with a goal and working backward to something you already know. This disarmingly elementary book explains how to harness curiosity in the classroom, bring the inventive faculties of students into play, and experience the triumph of discovery. But it’s not just for the classroom. Generations of readers from all walks of life have relished Polya’s brilliantly deft instructions on stripping away irrelevancies and going…