Assignment IV Math for Poets 2007

Try to write concisely (this is only specified in Question 1, but it also holds for Questions 2, 3 and 4).

Question 1: Through time the learned world struggled with the concept of Infinity . This also holds for Galileo Galilei. What was the problem he encountered? Did he solve it? Write a brief report about this (i.e. less than 250 words).
Question 2: In the book, read paragraphs 3.1 and 3.2 and answer the question: What is a number?
Question 3: Is a number the same as a numeral ? In this respect, what is the difference (or what are the differences) between the number 0 and the numeral 0?
Question 4: Question 9 on page 142.