perplexus.info :: Just Math : Sum of the page numbers

Sum of the page numbers (Posted on 2018-11-05)

What is the sum of the page numbers of the middle two pages
in a book with k pages?

See The Solution Submitted by Ady TZIDON

No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)

re(2): Not so simple (spoiler)

Comment 3 of 3 |

(In reply to re: Not so simple (spoiler) by Charlie)

My intention was to make the solver understand that :

i. k cannot be 1

ii. there are 2 different evaluations for even k and odd k.

SH explanation makes it so simple!

Posted by Ady TZIDON on 2018-11-05 10:41:43

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (17)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info