perplexus.info :: Numbers : Choosing the right number

Choosing the right number (Posted on 2018-02-13)

From a set of 2n+1 consecutive integers a certain number, say x, is selected in a way that the remaining n pairs can be arranged as couples having the same sum.

What are all the possible values of x making such task doable?

Submitted by Ady TZIDON

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Solution: (Hide)

1st, last and middle i.e. 1, n+1, 2n+1

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re(2): Not feeling literal	Steve Herman	2018-02-14 10:04:52
re: Not feeling literal	Ady TZIDON	2018-02-14 08:58:22
re(2): Not feeling literal	Ady TZIDON	2018-02-14 08:55:36
re: Not feeling literal	armando	2018-02-14 02:15:09
Not feeling literal	Steve Herman	2018-02-13 20:24:52
Easy, isn't it?	armando	2018-02-13 09:59:31

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