Problems of the Week - January 4 to January 9

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: Abby has $5.00 to spend on snacks. Cookies cost 50¢ per cookie, chips cost 75¢ per bag, and juice costs $1.00 per bottle. If Abby buys one of each, how much money will she have left?

Upper Elementary:

Question: Brianna has a box that can hold up to 50 pounds. She puts 3 books that each weigh 2 pounds inside the box. She also puts a lamp that weighs 20 pounds inside the box. What percent of the box’s maximum weight capacity does Brianna have left to fill? 

 Middle School:

Question: Caleb has an aquarium that is 2 feet long, 1 foot wide, and 1 foot tall. A gallon is equal to 231 cubic inches. How many whole gallons of water can the aquarium hold?

Algebra and Up:

Question: Darcy is decorating her bedroom and sketches a floor plan to a 1:12 scale. What is the area of the surface of a desk that is 31/2 inches long and 21/4 inches wide on Darcy’s sketch? 

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

Preeti has a colorful, multi-patterned collection of socks. She has 12 pairs of socks, but each pair is different.

If Preeti grabs a pair of socks at random from her sock drawer, what is the probability she gets a matched pair?