All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars
 perplexus dot info

 One more line (Posted on 2017-05-10)
Examine the following triplets, find out the logic behind the arrangements and add another coherent line:

14; (3,431,961); 7
13; (5,121,692); 8
12; (7,291,443); 9
11; (10,001,214); 10

 See The Solution Submitted by Ady TZIDON No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
 trivial solution? -- or is this not the solution? | Comment 1 of 4
I say trivial in the sense that a cubic equation can be fitted to any four points.

At first I thought the middle entry, N2, was a set of three numbers, but then realized the commas are just the ordinary demarcation of groups of three digits in a large number, in this case, numbers running in the millions.

The N1 sequence is obviously decreasing linearly and N3 is increasing linearly. The only hypothesis I can think of is that the N2 sequence is part of a cubic sequence.

We need not find the actual equation, just finite differences:
`3431961     5121692     7291443    10001214    13311005      1689731     2169751     2709771     3309791             480020      540020      600020                    60000       60000`

making the next line:

10; (13,311,005); 11

 Posted by Charlie on 2017-05-10 10:32:24

 Search: Search body:
Forums (0)