Quote:
Originally Posted by dreams
I remember a set at my grandmother's house and the "logs" were of wood. I think they were in a cylindrical can and my brothers and I had lots of hours of fun playing with them.  |
Quote:
Originally Posted by Stitchawl
Plastic?????? I thought you were older than that!
"My" Lincoln Logs were made of wood stained brown. The flat roof boards were stained green! They even caused splinters sometimes!
Stitchawl
|
Oh my yes. Plastic Lincoln Logs? When was such a travesty allowed? How can one think of building Lincoln's log cabin with plastic? I wish I still had my set, complete with the cylindrical container with the metal screw top.
Speaking of toys from long ago did anyone else ever have a set of American Plastic Bricks™ by Elgo Plastics Company?
Even cooler that Lincoln Logs in the sorts of buildings one could construct.
So anyway I think it is time for one of the always popular math questions. Who out there is as smart as a 3rd Grader? The story supposedly is that when Carl Friedrich Gauss was in the 3rd grade his instructor, probably intending to keep the class busy doing sums for a while, assigned the problem of calculating the sum of all natural numbers 1 to 100. The instructor was stunned when Gauss a few moments later presented not only that sum, but a general formula for the sum of natural numbers from 1 to N for any number N. Gauss supposedly figuring out that formula in that short interval.
So that is the question. Provide a formula for the sum of natural numbers 1 to N, 1+2+3+ . . . +(N-1) +N, and prove that it holds for all numbers N.