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Word Problems

Browse Middle School Word Problems
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Selected answers to common questions:
    Mixture problems.

Barrel Volume [9/8/1996]
How many gallons are in a barrel?

Baseball Game Logic Puzzle [10/23/2006]
One day four baseball games were played, involving eight teams. Three people each predicted the four winners of the games. Use their predictions to determine which teams played each other.

Baseballs, Buckets, and Milk Cartons [10/09/2001]
The mass of a baseball is 50g. What is the mass of a bucket when 2 buckets = 6 blocks; 1 bucket + 1 block = 2 milk cartons; and 2 baseballs = 1 milk carton.

Basketball Court [01/07/1998]
If a straight line is drawn diagonally from one corner of the court to the opposite corner, how many tiles will the diagonal intersect?

Bedbugs and Beds [09/14/1997]
In each single bed you can find 7 bedbugs, and in each double bed 13 bedbugs. If there are 106 bedbugs in all, how many double beds are there?

Ben and Bill [12/21/1997]
Bill + Ben's age = 91. Bill is twice as old as Ben was when Bill was as old as Ben is now.

Biking and Walking [06/02/1997]
Juan can bike twice as fast as he can run...

Bird Flying between Trains [08/30/1997]
Two trains are 150 kilometers apart, heading toward each other along a single track...

Borrowing and Returning Books [03/26/2001]
Four students borrowed books from a bookshelf and eight students returned books. There are 27 books on the shelf. How many books were there in the beginning?

Boys Wearing Glasses [07/07/1999]
How many boys in a school wear spectacles if there are 1400 pupils, 1/4 of those wear spectacles, and 2/7 of them are boys?

Bulgarian Goats [05/17/2003]
How many goats are there in the herd? What are the sizes of the feeding groups once they have stabilised? Find at least two possible cyclic patterns of sizes.

Burning Candles [06/10/1999]
A candle is lit at 4:30 and burns until 10:30, and a shorter one is lit at 6:00 and goes out at 10:00. If they were the same length at 8:30, what were their original lengths?

Bus Fare Problem [02/12/1998]
Each of 5 students paid a fare with 5 coins, for a total of $21.83. How many pennies did the bus driver receive?

Buying Stamps [08/21/1997]
You buy .02 and .15 stamps, paying $1.56 in all. There are 10 more .02 than .15 stamps; how many of each kind did you buy?

Calculating Maximum Heart Rates by Age [08/08/2005]
Find the heart rate of a 15 year old at 85% intensity.

Calculating Percentage Markup Versus Profit [01/23/2004]
In order to figure a profit of 10% I would normally take my cost and then multiply by 1.1 to find the selling price. My employer tells me that in order to find a 10% profit I should divide my cost by 0.9, but I don't understand how this is 10%. Can you please explain?

Candy Bar Puzzle [10/28/1996]
Raymond gives candy bars away in a specific pattern until he has no candy bars left. How many candy bars did he start with?

Car Laps [01/26/2001]
On a race track, one car travels 5 laps a minute and another car travels 8 laps a minute. How long will it be before the second car laps the first?

Carpeting a Room [2/1/1995]
Please tell me how many square yards of carpeting are needed for the following room/closet.

Cars Leaving at Different Times [09/28/2003]
Two cars leave a garage traveling in opposite directions. One car leaves at 8 am and averages 60 mph. The other car leaves at 9 am and averages 50 mph. At what time will they be 225 miles apart?

Census Taker [02/20/2002]
The census taker says, "I need to know the ages of your children."

Challenging Age Problem with System of Equations [01/30/2005]
A man is three times as old as his son was at the time when the father was twice as old as his son will be two years from now. Find the present age of each if they sum to 55.

Challenging Algebra Age Problem [02/29/2004]
A man has nine children whose ages are at an exact interval. The sum of the squares of the ages of each is the square of his own age. What is the age of each child and the man?

Changing Percent to Decimal [5/21/1996]
In a survey of 270 grade 9 students, 58 percent liked rock music. How many did not like rock music?

Changing Word Problems to Algebra [4/4/1996]
The difference of twice one number three times another number is 24. Find the numbers if their product is a minimum.

Checking Your Work [09/11/2003]
Our whole class has come up with one answer to a problem, while the teacher's answer book gives a different answer. What have we done wrong?

A Chicken and a Half?! [05/07/1997]
If a chicken and a half lays an egg and a half in a day and a half, how long does it take to get a dozen eggs?

Choosing 3 of 6 Colors [03/03/2000]
Patrick has a box of crayons with red, blue, yellow, orange, green and purple. How many different ways can Patrick select 3 colors?

Choosing an Unknown [08/06/1997]
What is the easiest way to do a hard word problem?

Circumference of a 123-year-old Tree [08/01/1999]
If a tree grows a 1/4-inch-thick ring each year for the first 60 years, 1/3-inch-rings for the next 80 years, and 1/2-inch-rings for the next 200 years, what is the circumference of a 123-year-old tree?

Classic Rate, Time, Distance Problem [09/30/2004]
If Joe travels at 50 mph, he arrives at his destination 20 minutes faster than if he travels at 45 mph. How far does he travel?

Climbing Out of a Well [04/02/2008]
A worm is at the bottom of a well that is 100 feet deep. Each day, he climbs up 5 feet towards the top. At night he falls back 2 feet. How many days will it take him to reach the top of the well?

Clock Hands [01/14/1998]
The minute hand of a clock is 3 cm longer then the hour hand. If the distance between the tips of the hands at nine o'clock is 15 cm, how long is the minute hand?

Clock Losing Time [9/9/1996]
A clock shows the correct time on May 1 at 1:00 P.M, but loses 20 minutes a day. When will the clock show the correct time again?

Coffee or Tea? [07/09/2001]
Is there more coffee in the tea, or more tea in the coffee, or are they the same?

Combining Rates of Work [08/30/1998]
It takes me 3 hours to paint a house. It takes you 5 hours to paint a house. How long will it take for both of us to paint a house?

Combining Rates of Work [10/27/1998]
Jones takes 12 hours to complete a task. Marco arrives, and they finish in 2 hours. How long would Marco have needed to do the job alone?

Combining Rates of Work, Revealing Constants of Word Problems [11/13/2011]
An adult wonders how to logically reason through problems that entail combining rates of work. Moved to re-examine the mechanics he learned in high school, Doctor Jerry introduces a constant tacitly assumed in the wording of such problems.

Commissions [03/19/2002]
Mildred receives a 5% commission on her sales of exercise equipment and a 6% commission on her sales of weight training equipment...

Comparing Prices [09/29/2003]
Which of these is the better buy: a 6-ounce can of tuna that sells for $1.59, or a package of three 3-ounce cans for $2.19?

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