Tuesday, February 09, 2010
as if you cant kill your brain enough in one day -.-, amc and NOI training
amc questions:
A fly trapped in a 1inch cubic box was bored and decided to visit all the edges of the box. The fly can either crawl or fly in a straight line in the box. It will start at one edge and visit all the other edges once before returning to where it started. Find the longest possible distance the fly would travel.
Susposed to be mcq but forgot the options, think got 4*(3)^(1/2)+4*(2)^(1/2)
Person A pickes 3 digits from a set of numbers : {1,2,3,4,5,6,7,8,9} and arranges them in descending order to form a number. Person B does ther same but picks his digits from the set {1,2,3,4,5,6,7,8} instead. What is the probability of Person A getting a bigger number than Person B?
er.... GG