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If , how can I prove ? Eugene Chen, MIT, class of 2017 233 votes Let's look at the polynomial . Note that if , then . So by the Factor theorem,  is a factor of . Similarly,  and  are factors of . Because  is a degree 3 polynomial, we mu... Read More » What are some examples of deceptively simple-looking math problems? Yonah Borns-Weil, MIT Class of 2018, Majoring in Mathem... 28 votes There are a lot responses with open problems here, and I thought I'd add one that some of you could solve, even though it's pretty tough. I'd peg it at early-mid olympiad l... Read More » Adrian Lamo is a great hacker. I want to be a great hacker like him. From where should I start and how long will it take to be a hacker like him? Kim Guldberg, Never expected my marines to follow m... 158 votes It will probably take you a weekend if you work hard, it's not tht hard and you don’t actually have to learn anything. I have looked through Quora, because this question ge... Read More » What was Vladimir Novakovski's Ph.D. thesis? Vladimir Novakovski, Technology and finance 23 votes I did not finish work on my thesis back in 2004-2005, but as far as what it was supposed to be -- the thesis is basically a combination of three papers. In my case, the pa... Read More » What are five problems every programmer should be able to answer? Stephen Kurtzman, Engineer, Mathematician, Computer Sci... 257 votes Sorting and knowing the differences in complexity between bubble sort, quicksort, and heap sort. When, why, and how to use common data structures such as lists, queues, dequ...  Read More » In computer programming, what is faster, a for loop that prints "Hello World" to the screen 1000 times or 1000 print statements that each display "Hello World" once? Greg Kemnitz, wrote the innards of "the world's sma... 29 votes There are ways to make the thousand writes faster, but not by using a loop versus a bunch of in-line statements (which will be so close in performance that they'll be negli... Read More » For learning data science, is Data Camp better than Coursera's data science specialization? Umair Durrani 41 votes I didn't find John Hopkin's Data Science specialization on coursera very interesting. The instructors usually just talk about the code, the application and reasoning behind... Read More » What are some programming languages that "are here to stay"? Matt Pickering, Life is a rogue wave in a quantum sea 48 votes COBOL - Still humming along after 60 years. Nothing better when it comes to running through large volumes of data predictably and the core of banking, insurance, governmen...  Read More » I became disappointed about being a programmer. What is your suggestion? Aakash Japi, Berkeley CS '17, Programming since 16 90 votes So you hit a roadblock, and now you want to quit? Well, then you might as well give up now, because the obstacles don't go away. Once you learn basic PHP, you'll have issue... Read More » A white and black pig weigh 320 kg altogether. The black pig weighs 32 kg a more than the white pig. How much does the white pig weigh? Peter Flom, Independent statistical consultant fo... 38 votes Manas Dhruve gave one method. Here's another: If the two pigs were equal in weight, then each would weigh 160 kg. Since the black pig weighs 32 kg more than the white one,... Read More »

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