10 Lesser Known Facts About Math

For many students, the idea of ‘math‘ brings about some less than savory feelings. Dislike, anxiety, dread, etc etc. But as many teachers know, math can be fun too, and it has many practical applications in daily life. Just for fun, the handy infographic below outlines 10 lesser known facts about math. Share them with your students or just add them to your arsenal of fun facts to share with others at cocktail parties! Happy Wednesday!

10 Lesser Known Facts About Math

  1. 0.999… is equal to 1!
  2. A palindrome number is one that reads the same backwards and forwards
  3. Americans call mathematics (maths) in the singular form, math, arguing that ‘mathematics’ functions as a singular noun
  4. Four is the only number in the english language with the same number of letters as the number itself
  5. The number 5 is pronounced as ‘ha’ in the Thai lanugage. 555 is also used by some as slang for “Ha, Ha, Ha”
  6. Some math problems are designed to be confounding
  7. Evariste Galois invented an entirely new branch of math called group theory when he was in his teens
  8. The easiest way to remember the value of Pi is to count the number of letters in each word in “May I have a large container of coffee’
  9. The equal sign was invented by an English mathematician in 1557
  10. There are shapes of constant width other than the circle.



  1. Kyle

    May 15, 2014 at 10:52 pm

    Interesting article! However 0.999 does not equal 1. The explanation uses rounding and 0.999 could be rounded to 1 however it is definitely not EQUAL to 1.

    • Michael

      May 16, 2014 at 2:15 pm

      Kyle is right. However only the text version of the article is wrong.
      The image shows a better version:
      It says 0.999… =1
      Assuming an infinite number of 9s (“period”) it turns out to be correct – thats the way it was meant.

    • Georg Barta

      May 16, 2014 at 2:20 pm

      Kyle ist right of course.

      Katie Lepie, who wrote the text, obviously did not understand what she was doing: the number that ist equal to 1 is given correct in the round picture designed by studygeek.org, namely 0.999… meaning an infinite number of nines after the decimal point.
      And edudemic did not find this error?

      By the way, it is not the only one: the name of the French mathematician of item 7 is Galois, not Galais.

      Maybe someone should read texts before publishing them.

      • Katie Lepi

        May 16, 2014 at 2:47 pm

        Hi Georg, Kyle, and Michael –

        I do apologize for the typo, which was the omission of the … . I’ve added it back in to ensure clarity!

        Perhaps Georg should also look into reading his text before he publishes it – since he clearly looked at the top of the article to point out the name of the person who ‘doesn’t understand’, but he wrote it incorrectly, along with the word ‘ist’ instead of ‘is’, if we’re being picky here (which clearly we are!)

        Georg, please try to contribute to the Edudemic community in a more positive manner in the future, rather than snidely indicating that we don’t know what we’re doing.