Problem of the Week Solution Archive
Problem of the Week #1
Elevator Ride Jackie, our beloved custodian, got a new job at Towers High School. He began his day in the basement. He took the elevator up 20 floors to fix a light. Then he took the elevator down 8 floors to repair a broken window. Next he went up 7 floors to have lunch in the cafeteria. The floor with the cafeteria is the halfway point in the building. How many floors are in Towers High? Show your work using pictures, numbers or symbols. Prefer to work it out by hand? Download a paper copy here. 
SOLUTION The solution could be 37, 38 or 39, depending on how the problem was interpreted. Based on the clues, the halfway point is floor 19. If you add 19 + 19, then the building has 38 floors. If you believe that from floor 19, there are 18 floors above and 18 floors below, then the answer is 36 + 1 (for floor 19) or 37. And if you remembered to include the basement as a floor, then the answer could be 38+1 = 39 or 37 + 1 = 38. 
20132014 Solution ArchiveProblem of the Week #17

SOLUTION
Part A: If Anna has 12 dimes and 3 nickels, she would have 15 coins and $1.35 Part B: If Royce has 8 dimes and 2 quarters, he would have onefourth as many quarters as dimes and he would have $1.30. 
Problem of the Week #16

SOLUTION
There could be 35 triangles formed in a regular pentagon. 
Problem of the Week #15

SOLUTION
If a 12inch ruler has a mark every eighth of an inch, but not one at 0 or 12, then the ruler would have 95 marks. 
Problem of the Week #14

SOLUTION
It would take a total of 192 secs or 3 mins and 12 seconds to write the numbers 1100. 19= 9 seconds 1099= 180 seconds 100= 3 seconds 
Problem of the Week #13
Build a Staircase This stairway is made of cubes. How many cubes would be needed to make the steps 9 steps high? Show your work using pictures, numbers or symbols. Prefer to work it out by hand? Download a copy of the POW here. 
SOLUTION
You would need 45 cubes to make the staircase 9 cubes high. 
Problem of the Week #12
Halfway Day Collection Pierce students collected half dollars in honor of halfway day to be donated to the Brookline Community Mental Health Center. When the money was sorted there were: Column A Column B 3 tendollar bills 547 quarters 3 fivedollar bills 96 dimes 77 onedollar bills 52 nickels 26 halfdollar coins 238 pennies 3 onedollar coins A. For grades K2: What was the total amount of dollars collected? (Using the information in Column A.) B. For grades 36: What is the total amount of money collected? Show your work using pictures, numbers or symbols. Prefer to work it out by hand? Download a copy here. 
SOLUTION
Part A: The total number of dollars collected is $138.00 Part B: The total amount of money collected is $289.33 
Problem of the Week #11
Too Much Valentine's Candy! Three children got on the scale at the same time. They weighed 181 pounds. Then one child got off and the scale read 119 pounds. Then another one got off and the scale read 74 pounds. When the last child got off, the scale returned to zero. “I weigh the least, because I am the smallest,” said Sophie. “I weigh the most because I am the biggest,” said Morgan. “I must have eaten too much Valentine's candy,” said Danny. How much does Sophie weigh? Show your work using pictures, numbers or symbols. Prefer to work it out on paper? Download a copy here. 
SOLUTION
Sophie weighs 45 pounds 
Problem of the Week #10
Sum of Digits is 24 985 (9+8+5=22) The sum of the digits in the number 994 is also 22 (9+9+4=22). How many 3digit even numbers are there that have 24 as the sum of their digits? Record all the possibilities. Show your work using pictures, numbers or symbols. Rather work it out by hand? Download a paper copy here. 
SOLUTION
There are FOUR 3digit even numbers with a sum of 24: 888,996,978, and 798 
Problem of the Week # 9

SOLUTIONThere are 132 dates in each year that could be unclear (For each of the 12 months, there are 11 dates that could be reversed, and 12 x 11=132).

POW #8
The Sporting Store
The sporting Store bought baseballs and softballs. The owner realized that 3 baseballs cost the same as 4 softballs. It costs $14.00 to buy one baseball and one softball.
How much does 1 baseball cost? Prefer to work on paper? Download a copy here. 
SOLUTIONOne baseball would cost $8.00 (Given the information that 3 baseballs cost the same as 4 softballs, and it costs $14 to buy one of each, then 3 x $8.00 = 4 x $6.00 and $8.00 + $6.00 = $14.00)

Problem of the Week #7

SOLUTIONQuestion 1: Answer is 1/4.
Question 2: Answer is $600 (the striped and checkered sections make up 9/16 or 3/4 of the window, 3/4 of $800 is $600). 
Problem of the Week #6

SOLUTIONA=7
B=8 C=9 D=5 E=4 F=3 
Problem of the Week #5

SOLUTION
Question A: 30 families (If each family donated $50, then you would need 30 families to reach $1500.)
Question B: $200. (If 50% of the approximately 500 families at Pierce wanted to raise $50,000, each family would need to contribute $200.) 
Problem of the Week #4

SOLUTION
The solution to problem #4 "Halloween Costumes" is 5 trickortreater are wearing neither a mask nor a hat. 
20122013 Solution Archive
20112012 POW ARCHIVE
Problem of the Week #12

SOLUTIONIf there are 16 basketball teams in four regions and each team plays until they lose one game, then the answer is that there are 63 games in the tournament.

PROBLEM OF THE WEEK #6

SOLUTIONThe correct answer to "Unicef Collection" is as follows: The total bills and checks for questions A is $441.24 and the total bills, checks, and
coins for question B is $1,268.87. 
PROBLEM OF THE WEEK #3

SOLUTION
The correct answer was either 30 or 32 minutes.

PROBLEM OF THE WEEK #2

SOLUTION
The correct answer was Jack had 55 shells.

PROBLEM OF THE WEEK #1

SOLUTION
The correct answer was that 7 cats ate mousie meat (2 lucky cats ate 7 mice each and 5 unlucky cats ate 2 mice each, for a total of 24 mice).
