Newspaper Sheets — Puzzle for Interview rounds

Question :

A newspaper made of 16 large sheets of paper folded in half. The newspaper has 64 pages altogether. The first sheet contains pages 1, 2, 63, 64.

If we pick up a sheet containing page number 45. What are the other pages that this sheet contains?

Solution :

On the back of 45, it is 46. The pages are such that for each page p, 65-p will be also on the same page.

Then,
65–45 = 20
65–46 = 19

So the four pages in this sheet are 19, 20, 45, 46.

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