CAT 2001 Question 28

Question 28

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?


If the number of pages is 44, the sum will be 44*45/2 = 22*45 = 990
So, the number 10 was added twice

Create a FREE account and get:

  • All Quant CAT Formulas and shortcuts PDF
  • 20+ CAT previous papers with solutions PDF
  • Top 500 CAT Solved Questions for Free


Register with


Boost your Prep!

Download App