What switz said. It's useful as a very early screening because it eliminates a lot of people who are wasting your time and is so simple as to have almost to fa

What switz said. It's useful as a very early screening because it eliminates a lot of people who are wasting your time and is so simple as to have almost to false negatives. It has no complexity, no algorithm or concepts you might be unfamiliar with- just the for loop, the conditional, and the modulo operator. No one who claims to be a professional developer should fail it. For reference: http://www.codinghorror.com/blog/2007/02/why-cant-programmers-program.html http://www.codinghorror.com/blog/2007/02/why-cant-programmer...