Aaron is at a spot in his book where the page numbers of the two facing pages have a product of 1980 what are the two page numbers

Basically you know that they are 2 consecutive numbers whose product is 1980.

n * (n+1) = 1980

n^2 + n - 1980 = 0

(n - 44) (n + 45) = 0

n=44

so the 2 page numbers is 44 and 45.

The faster way is just to take the square root of 1980 and since that is 44.497 you can conclude that the 2 numbers is below and above it (44, 45)