TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: physical property 
Words: thin, brittleness, heavy, angular momentum, fat

SOLUTION: heavy

PROBLEM: Category: bird 
Words: digger, heron, crane, mallet, sandpiper

SOLUTION: digger

PROBLEM: Category: computers 
Words: ram, image, format, organize, file

SOLUTION:
organize