Data Intelligence, Business Analytics
Challenging problems, brain teasers, just for fun.
Latest Activity: Sep 30, 2012
If you empty a bathtub one yard north of the equator, the whirlpool is spinning clockwise. One yard south of the equator, it is spinning anti-clockwise. There's even a tourist attraction in Kenya…Continue
Started by Vincent Granville. Last reply by Amanda Shankle-Knowlton Jul 18, 2011.
Based on density and spatial location of nuclear plants on Earth, what is the probability of a 1-ton asteroid (just big enough to create an impact crater) to hit any place on earth less than 50 miles…Continue
Started by Amy. Last reply by Vincent Granville Apr 17, 2011.
Let's assume that we have N traders, trading randomly using market-neutral strategies (or trading randomly in a neutral market, as the one we have now).Each day, each trader re-invests all her gains.…Continue
Started by Vincent Granville. Last reply by Ralph Winters Nov 30, 2010.
You have to compute a list of multi-token keywords that contain specific one-token keywords such as car, insurance, degree, etc. You have a 10MM multi-token keyword list, and a 5,000 list of…Continue
Started by Vincent Granville Jul 20, 2010.
Assuming that the Universe is compact and expanding at a constant rate in all directions, and using a model of the Universe that seems reasonable:1) Can we measure the minimum speed v at which a…Continue
Started by Mirko Krivanek. Last reply by Vincent Granville Jun 13, 2010.
In a contest, 20 participants are asked to sample 12 wines: 6 wines are in the $15-25/bottle price range, and 6 ones are in the $80-150/bottle price range. For each of the 12 wines, participants are…Continue
Started by Vincent Granville. Last reply by Vincent Granville Mar 11, 2010.