Problems of the Week - September 28 to October 3

Rewards for Problems of the week:

5 points for the correct answer at your level; 10 points for the next level; 20 points each for 2+ levels up. 

Lower Elementary:

Question: Ellie breaks open her piggy bank and finds a half dollar, two quarters, two dimes, a nickel, and two pennies. How much money does Ellie have?

Upper Elementary:

Question: Packs of trading cards cost $3.50. What is the greatest number of packs of trading cards that Kaylee can buy with a $20.00 bill?

Middle School:

Question: Logan buys a box of 64 colored pencils for $24.00 and a box of 36 crayons for $12.60. Which costs more, a single colored pencil or a single crayon?

Algebra and Up:

Question: The value of a painting increases by 2% each year. If the painting is worth $1,000.00 today, how much was it worth exactly 50 years ago?

Challenge problem to take home. 20 points for the correct answer. 

In a $$5 \times 5$5\times 5$ grid, how many rectangles are there with an area of $$4?$4?$Remember, squares are rectangles, too!