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2. Instant Insanity - Wikipedia

   en.wikipedia.org/wiki/Instant_Insanity

   Given n cubes, with the faces of each cube coloured with one of n colours, determining if it is possible to stack the cubes so that each colour appears exactly once on each of the 4 sides of the stack is NP-complete. [8] [9] The cube stacking game is a two-player game version of this puzzle. Given an ordered list of cubes, the players take ...

3. Packing problems - Wikipedia

   en.wikipedia.org/wiki/Packing_problems

   v. t. e. Packing problems are a class of optimization problems in mathematics that involve attempting to pack objects together into containers. The goal is to either pack a single container as densely as possible or pack all objects using as few containers as possible. Many of these problems can be related to real-life packaging, storage and ...

4. Sum of four cubes problem - Wikipedia

   en.wikipedia.org/wiki/Sum_of_four_cubes_problem

   The sum of four cubes problem[1] asks whether every integer is the sum of four cubes of integers. It is conjectured the answer is affirmative, but this conjecture has been neither proven nor disproven. [2] Some of the cubes may be negative numbers, in contrast to Waring's problem on sums of cubes, where they are required to be positive.

5. The Life and Death of an Amazon Warehouse Temp

   highline.huffingtonpost.com/articles/en/life-and...

   He had collapsed and was lying unconscious in aisle A-215, beneath shelves stocked with Tupperware and heating pads. ♦ ♦ ♦ In the years since Amazon became the symbol of the online retail economy, horror stories have periodically emerged about the conditions at its warehouses—workers faced with near-impossible targets, people dropping ...

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Optimal solutions for the Rubik's Cube - Wikipedia

   en.wikipedia.org/wiki/Optimal_solutions_for_the...

   In multiple-layer cubes, numbers may precede face names to indicate rotation of the nth layer from the named face. 2R, 2F and 2U are then used to denote turning layers next to R, F and U respectively in the same direction as R, F and U. Using this notation for a three-layer cube is more consistent with multiple-layer cubes. [7] Rotating the ...