Periods 2 and 5
p168-169 14-34 evens
Quiz Fri sections 3-5 to 3-8
p122-123 #12-32 evens
Friday Algebraic equations and order of operations
Wednesday, October 22, 2014
Tuesday, October 21, 2014
Monday, October 20, 2014
Friday, October 17, 2014
A new school has exactly 1,000 lockers and exactly 1,000 students. On the first day of school, the students meet outside the building and agree on the following plan: The first student will enter the school and open all of the lockers. The second student will then enter the school and close every even numbered locker. The third student will reverse* every third locker. The fourth student will reverse every fourth locker, and so on until 1,000 students in turn have entered the building and reversed the proper lockers. Which lockers will finally remain open? Explain
*Reverse is defined as if the locker is found open then close it or if the locker is found closed then open it.
Strategy Solve a similar smaller problem to help establish a pattern.
Note: You should try to model 30 lockers with 30 students to see if there is a pattern. Include the model or observations on the paper that you turn in.
As you solve this problem think about who touches each locker. Remember that the problem says "which lockers are open" not how many.
Posted by Mr. Keller at 3:30 PM