Tag Archives: math

Student inadvertently solves never-before-solved math problems

My informant told me about a story she heard about a student waking up late and rushing to their final, then frantically trying to finish the three equations on the board. The first two weren’t so bad, but the third was difficult. He finally finished and turned it into the professor only to find out later the third was actually not part of the test. Instead, it was a problem that had as of yet been unsolved. He had figured it out, though. My informant likes it because she thinks it would be cool to accidentally become famous like that and because it relates to one of her favorite movies, Good Will Hunting, since the main character in it easily solves equations no else could.

I like how the story reflects how we believe what we hear; when we are told something is impossible, it will seem much harder in our mind. But when we think something is supposed to be solvable, it may be easier to figure out, even if it’s never been done before. Limitations we place on ourselves are often illusory.

I looked into the story and found that it is actually based in truth. In 1939, George Dantzig arrived late to his graduate statistics class and saw two problems on the board, not knowing they were examples of problems that had never been solved. He thought they were a homework assignment and was able to solve them. He found out the reality six weeks later when his teacher let him know and helped him publish a paper about one of the problems.

Annotation: Cottle, Richard, Ellis Johnson, and Roger Wets. “George B. Dantzig.” Notices of the AMS 54.3 (2007). Web. April 23 2012.

Riddle – American

Make the following equation true by drawing only one straight line:

5 + 5 + 5 = 550

Answer: 5 4 5 + 5 = 550

My informant saw this riddle on a Facebook wall post from her roommate.  She was bored one day and did not want to do homework, so she asked her roommate to give her something to do.  Her roommate posted this riddle on her Facebook wall.  My informant worked on the riddle for a very long time but could not figure out the answer.  Eventually, her roommate gave my informant the answer to the riddle.   It is interesting that my informant heard this riddle from an engineering major, since the riddle is a play on a math problem.

My informant believes this riddle is popular among math and engineering students as well as anyone who enjoys mathematics.  My informant also believes that because she could not figure out the riddle because she is not as skilled at mathematics as her roommate is.

I believe that figuring out this riddle has nothing to do with mathematics.  I think this riddle is visual.  Those who are very observant and visual people are more likely to solve this riddle.

Collector’s note:  How this riddle was shared demonstrates the influence of the Internet on the spread of folklore.