A newspaper is made of several A2 sheets folded in the middle so that each sheet makes 4 numbered pages. For example, two sheets make 8 pages.

1. Sometimes a newspaper has a single half sheet of just 2 pages inserted somewhere. Friday's newspaper has such an insert and one of the numbers on the insert is 53. Abgail noticed that there are twice as many sheets below as there are above it. Find the last page number in this newspaper. Explain why there is only one answer. If you find the answer can you also tell me how u worked it out. Thank you!