A, B, C and D are triangular numbers.

A, B and C are always consecutive while D is their sum.

Determine (and explain as best as possible¹) how such sets of values are distributed across the number system.

^1. This can be explained in terms of a single variable expression.

(In reply to a 6.4 second question by Ady TZIDON)

Pardon, I realise that this just one example but the crux of the problem is to:

 " Determine how such sets of values are distributed across the number system."


(The next set would be 36+45+55=136)

Edited on November 29, 2009, 7:01 pm

Posted by brianjn on 2009-11-29 18:12:09