1. All the page numbers from a book are added, beginning at page 1. However, one page number was added twice by mistake. The sum obtained was 1000. Which page number was added twice?
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By: anil on 05 May 2019 02.31 am
If the number of pages is 44, the sum will be 44*45/2 = 22*45 = 990
So, the number 10 was added twice
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So, the number 10 was added twice