I recently had 2/5 candidates with Master's degrees in CS unable to give me a number in hex. I didn't ask them to write a program to do it, just to include it i

I recently had 2/5 candidates with Master's degrees in CS unable to give me a number in hex. I didn't ask them to write a program to do it, just to include it in the email subject when replying to a posting. Another 2/5 of them gave me awful code to do it. It's kind of sad.