math problems of the week Mathnasium of Westford

Apr 28, 2019 | Westford Chelmsford

Lower Elementary:

Question: Susan and her parents are making a disaster survival kit. Each of them needs 2 gallons of water per day. How much water does Susan’s family need in a survival kit to last 5 days?



Upper Elementary:

Question: Women in Gambia often need to transport large containers of water over great distances so that their families have safe water to drink. Siabatou has a container that holds 5 gallons of water. Each gallon weighs 8½ pounds. The container itself weighs 2½ pounds. How much does Siabatou’s container weigh when it’s full?


Middle School:

Question: A bathroom sink runs at 2.25 gallons per minute. Daisy uses a cup of water total each time she brushes her teeth. Jack leaves the faucet running for the full 3 minutes it takes him to brush and rinse. How much more water does Jack use each day if both of them brush their teeth 3 times a day?



Algebra and Up:

Question: In Sunnydale, the price of water is $1.50 per thousand gallons. Residents of Rainwood are charged a base fee of $9.90 and an additional $0.25 per thousand gallons of water used. Write an equation to find the amount of water that will cost the same amount in both Sunnydale and Rainwood.