Roberto Abraham Scaruffi

What were the Top 10 problems in Machine Learning for 2013? Alexis Pribula, Founder at FreshTake Media, Inc. 32 votes Shane Lewin's answer makes a crucial point about gathering large amounts of good data. I have witnessed that problem first hand at LinkedIn while working on Groups You May ... Read More »

What is the most effective yet efficient way to get rich? Evan Asano, founder, mediakix 6.2k votes There's a story of an Italian Billionaire when asked if he had to start over from scratch what he'd do (I searched Google 50 times to find the original without luck). He re... Read More »

Which spread is healthier: Nutella or peanut butter? Dan Holliday 69 votes To the comments -- the question is on Quora and is Quora property, not yours. Additionally, peanut butter is not a proper noun, Nutella is a protected term of a specific ... Read More »

I saw a shirt for $97. I borrowed $50 from mom and $50 from dad, $50 + $50= $100. Bought the shirt, $3 change. I gave $1 to mom, $1 to dad, and kept $1 for myself Now I owe mom $49 and dad $49. $49+ $49=$98 + my $1 =$99. Where did the other $1 go? Diana Crețu, Photo spammer @ http://dianacretu.quo... 60 votes Let's try some very simple accounting by comparing what you have, and what you owe: 1. First you have nothing, and you owe nothing: $0 / $0... Read More »

What is something I should do now that in 5 years I'll be glad to have done? Trevor Dupp 228 votes 1. Don't have that extra slice of pizza, you've had enough to eat already - you will regret it. 2. You don't need that new TV, and you certainly shouldn't put that on a st... Read More »

What are the steps to create an event with probability 1/16 from tossing a biased coin (51% head and 49% tail)? Raziman Thottungal Valapu, Probability enthusiast 30 votes Suppose that you could create an event with probability 1/2 from such a coin, creating an event with 1/16 is easy. But creating an event with a probability 1/2 is the same ... Read More »

Why can't I wrap my mind around using the sequence  to define e, and using e as its limit? Justin Rising, PhD in statistics 35 votes It's not circular at all. Since the limit exists, it must be equal to some number. We define that number to be , which is simply giving it a name. The fact that it's rel... Read More »

How does gravity slow down time? Naga Deepak P, Evolving as we speak.. 66 votes Before you start understanding the explanation, you need to teach your brain to accept the postulates that: 1) that the laws of physics are identical in all inertial system... Read More »

How did Elon Musk learn enough about rockets to run SpaceX? Jim Cantrell, Entrepreneur, strategist and race car... 7k votes I helped Elon start the company and all of these answers are spot on. He still has my book on rocket propulsion..... What I found from working with Elon is that he star... Read More »

What is  (the zeroth power of zero)? Anders Kaseorg, MIT S.B. in Math ’08; MIT PhD student... 1.2k votes This had previously been the subject of some debate in the mathematical community until Donald Knuth set things straight in 1992, so it’s understandable that some confusion... Read More »