North East Seattle Math Circle

 2021-2022  Virtual Math Circle 

Are you hungry for more math?  The  2021-22 NE Seattle Virtual Math Circle is starting up. We're looking for middle schoolers  (6th-86h grade) who enjoy puzzles, challenge problems and spending an hour after school with others who share their passion. We will be exploring a variety of topics such as geometry, number number theory and combinatorics. 

• Format: We will be meeting for an hour once a week online throughout the school year. As in previous years my goal is  to keep the size around 15-25 students
• Background: typically we've had a mix of kids who are currently taking anything from Math 7 to Geometry. A strong grasp of pre-algebra is needed and the willingness to ask questions when we talk about topics.
• Schedule:  TBD based on survey responses. Most likely it will be late afternoon or early evening. 
• Cost: 55$
• Email List: https://groups.google.com/g/ne-seattle-math-circle   - Ask to join 
  
• For more information email the group or myself directly: benleis1@gmail.com
• Sign up form: https://forms.gle/6RWB2JPVy92yZQuy7

Teasers 

The lockers in a school are numbered in order from 1 to 1000. Initially they are all closed. There are 1000 students in the same school. The 1st student goes through the school and opens every locker. The 2nd student goes through the school and for every 2nd locker if the locker is closed she opens it and if it is opened she closes it. The 3rd student does the same for every 3rd locker, the 4th for every 4th locker and so until all 1000 students have gone through the school. After all the of the students have finished, how many lockers are open?