Yeah but since they are used to filter out 'retards' I wonder what kind of questions there are to filter out all but the best? How long is it OK to work on your answer to these things - 10 seconds? Do you need to know immediately? Is it OK if it takes awhile as long as I am showing that I'm thinking (thinking somewhat out loud to show my cognitive process)? The interesting part in the penny problem is being able to articulate the 'why?' clearly.
Your going to look like a total fool and lose the opportunity if you try to bluff your way at all with this. Your not going to learn this stuff in a few months. Highlight your math background and ability to learn. If you don't have a strong math background to highlight then your just wasting your time.
The penny turns indeed 180 degrees, but relative to the central penny. The other 180 degrees are given by the fact that the central penny is round, so the reference system is changing its direction
Here is a 45 minute question The Problem Arbitrage is the trading of one currency for another with the hopes of taking advantage of small differences in conversion rates among several currencies in order to achieve a profit. For example, if $1.00 in U.S. currency buys 0.7 British pounds currency, £1 in British currency buys 9.5 French francs, and 1 French franc buys 0.16 in U.S. dollars, then an arbitrage trader can start with $1.00 and earn 1 x 0.7 x 9.5 x 0.16 = 1.064 dollars thus earning a profit of 6.4 percent. You will write a program that determines whether a sequence of currency exchanges can yield a profit as described above. To result in successful arbitrage, a sequence of exchanges must begin and end with the same currency, but any starting currency may be considered. The Input The input file consists of one or more conversion tables. You must solve the arbitrage problem for each of the tables in the input file. Each table is preceded by an integer n on a line by itself giving the dimensions of the table. The maximum dimension is 20; the minimum dimension is 2. The table then follows in row major order but with the diagonal elements of the table missing (these are assumed to have value 1.0). Thus the first row of the table represents the conversion rates between country 1 and n-1 other countries, i.e., the amount of currency of country i ( ) that can be purchased with one unit of the currency of country 1. Thus each table consists of n+1 lines in the input file: 1 line containing n and n lines representing the conversion table. The Output For each table in the input file you must determine whether a sequence of exchanges exists that results in a profit of more than 1 percent (0.01). If a sequence exists you must print the sequence of exchanges that results in a profit. If there is more than one sequence that results in a profit of more than 1 percent you must print a sequence of minimal length, i.e., one of the sequences that uses the fewest exchanges of currencies to yield a profit. Because the IRS (United States Internal Revenue Service) notices lengthy transaction sequences, all profiting sequences must consist of n or fewer transactions where n is the dimension of the table giving conversion rates. The sequence 1 2 1 represents two conversions. If a profiting sequence exists you must print the sequence of exchanges that results in a profit. The sequence is printed as a sequence of integers with the integer i representing the line of the conversion table (country i). The first integer in the sequence is the country from which the profiting sequence starts. This integer also ends the sequence. If no profiting sequence of n or fewer transactions exists, then the line no arbitrage sequence exists should be printed. Sample Input 3 1.2 .89 .88 5.1 1.1 0.15 4 3.1 0.0023 0.35 0.21 0.00353 8.13 200 180.559 10.339 2.11 0.089 0.06111 2 2.0 0.45 Sample Output 1 2 1 1 2 4 1 no arbitrage sequence exists Answer attached best of luck Ans: http://rafb.net/p/s2xuKp64.html
So how âfiltering out the retardsâ is working for WS so far ? Will you be finally able to beat SPX one day ? I bet the genius that came out with âmodelâ of selling exotic mortgages to janitors can solve all this in less than a minute.
Talk about your adventures in Africa, that should break the ice.... http://www.elitetrader.com/vb/showthread.php?s=&threadid=89877
i must admit, those questions are hard as hell. How the hell do answering those questions(and others like them) make one a better trader? thats bullshit. I think all that is over rated. i mean, it would nice to be able to answer those questions quickly, but that does not mean you are a good trader.