( Or, rather, would you want to hear some sarcastic racial stereotypes? Then let's begin! )
Introduction
Scientists have never really understood how the brain works. COmposed of billions and trillions of neurons awash in a sea of signaling fluids and strung up in a electrical system better than an AMD, the brain is a truly amazing thing. It can seperate the tracks in a symphony, estimate amounts and match objects effortlessly, not to mention have self consiousness.
But what psychologists do know, however, is that different races of people think differently, making them advantages in various things:
The Contestants
Americans, developed from a mix of English, Spanish, Mexicans, etc...
Quantitative over Qualitative
Subjective over Objective
Advantages: Highly complex language. Procedural, although multithreaded and deterministically realtime. "The Human Perl Compiler"
Europeans, including Deutsch, French, Italians, and Russians...
Qualitative over Quantitative
Objective over Subjective
Advantages: Uses analogies and class-based relationships to compare and evaluate input in multiple dimensions of factors. Mechanical advantage, can count M&M candies just by looking.
Asians, including Chinese, Japanese and Koreans...
Quantitative over Qualitative
Objective over Subjective
Advantages: Known for their astonishing talents in engineering, strategy games, and martial arts, these builds think in non-deterministic, non-procedural methods, giving them a natural advantage in rational reasoning.
Puzzle Time!
Here's a example of how these people woudl solve a simple problem:

(image)
The American:
Follows the largest numbers, 3 4 2, total 9. Sorry, wrong!
The Central American / African:
Computes total values for the first two rows, (4 7 3 6), then takes the "trend" path (3 -> 4), arriving at the same conclusion as the American.
The Australian:
Averages the numbers in each option set (calculator at hand), then takes the average of those, until he gets to the root. THen he follows the largest averages, without chekcing his answer. Oops!
The European:
Totals all of the numbers in the paths, then selecting the best. Time consuming, at least! (The totals are: 5 8 9 8 5 4 10 8)
The Asian: LOGISTIC REASONING!
Computes tree values, from the last rows, following the largest numbers (no point in choosing the smaller one)... then, he/she realizes...
THe Asian takes the largest number in the option set, for the last column, and writes it down. This reduced it to:
1 4 2 1 2 1 4 2 -> (1/4) 4 (2/1) 2 (2/1) 2 (4/2) 4 -> 4 2 2 4
adding to the parent choice, the subject establishes:
4 2 2 4 -> 4+1 2+4 2+2 4+5 -> 5 6 4 9
Reducing the row again, he establishes:
5 6 4 9 -> (5/6) 6 (4/9) 9 -> 6 9
adding to the parent choice, arriving at:
6 9 -> 6+3 9+1 -> 9 10
repeating to conclude at
9 10 -> (9/10) -> 10
The best choice is 1 -> 5 -> 4