What's my number? A math challenge



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Give your students the chance to develop numerical sense  and to appreciate mathematics from a multicultural perspective!


Allows students to create a "math puzzle" in which the reader needs to figure out which numbers to use  (based on clues given by the author) and then  answer to the math problem!


Project runs twice and begins  October 20! - March 1st.

In this project the students are asked to do two things:
  1. Create a set of clues (written  and illustrated) that challenge other students to use math to determine a specific number.
  2. Solve other math challenges posted by participants in this project

​Here an example of a math challenge sent by a student in Argentina to Delmar students in USA many years ago.
From Pablo and Luciano:

  1. The number of the States in the United States of America
  2. + plus the strings of a Stradivarius.
  3. _ minus the number of people in a soccer field
  4. x times the age of the football player Maradonna when he won the World Cup in 1986.

enlightenedAbout  the clues:

  1. No numbers. Use descriptions of the number to lead others to determine the number.
  2. The clue has to mention something that anyone can guess even if he lives in another country
  3. If you can, illustrate your clue with a drawing

Be sure to solve your own challenge before you send it to others!

How to Partecipate 

Projects Rules


Working space for teachers and students