At one time, a Bell telephone operator took this call from a young boy:
"Operator, I'm sorry to bother you but I can't find the minus key on this telephone. Could you please call 555 take away 2368. I know it sounds impossible, but that's the way it's listed in the phone book: 555-2368."
This is very similar to the much-passed-on YouTube video about a 5 year-old boy calling 911 for MATH help!