Some of you may know about how I went to a job interview earlier this year which totally destroyed my confidence in my interviewing capabilities, math, you name it. During the interview, I was asked to solve problems, which I could not. I left feeling frustrated and dumb.
Through a twist of fate, I was invited back to the company to do another interview for another position. As it turned out, one of my old interviewers came back. Despite being more prepared, I still could not solve the problem. This time around, I knew better. After five minutes into the problem, I told the interviewer that I am walking away.
Just for kicks and giggles, I asked him how many people were able to solve his problems onsite. He told me, one out of ten. Then, he offered me the chance to take the problem home and solve it. I replied that I might do that, but no guarantees. The funny thing was that we ended up catching up, and I got that he's not a bad person at all. I did give him feedback that they should customize the job postings to the positions offered as opposed to having a generic one to fill different positions. I walked away feeling okay, and yes, I did solve it at home.
For those of you that are up for the challenge, I included the problem below.
A company is currently getting 100k impressions, RPM (Revenue per 1k impression) is $1, and CPM (Cost per 1k impressions) is $1. If impressions increase linearly with CPM and rev per $1K is constant, what is the CPM that will maximize dollar margin?
Enjoy!
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