Problems of the Week - February 21 to February 27

Rewards for Problems of the week:

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

 Lower Elementary:

Question: Alice the librarian has a cart of 3 dozen books to put back on the shelves. She puts 3 of them away before she’s startled by a ghost and runs away. How many books does Alice leave on her cart?

Upper Elementary:

Question: Peter and Ray walk 4½ miles to get to the library to investigate some paranormal activity. If they can walk 3 miles in 1 hour, then how many minutes does it take them to get to the library?

 Middle School:

Question: A paranormal activity hotline receives 1,000 calls per hour, 24 hours per day, for 6 weeks straight. The paranormal investigators only respond to 2% of those calls. How many calls do the investigators respond to in 6 weeks?

Algebra and Up:

Question: A 6-inch tall marshmallow man has a volume of 15 cubic inches. If the marshmallow man magically increases in size so that he grows proportionally to a height of 100 feet, then what is his new volume?

Challenge problem to take home. 5 stars for the correct answer. 

A Tangram company is making pieces out of new plastic, and they need to figure out the total cost of each puzzle. The smallest triangle in the puzzle costs 25 cents to make.

How much will it cost to make a whole tangram puzzle?