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Browse all Algebra Problems of the Week
Participation in the Algebra Problems of the
Week allows teachers and students to address the
NCTM
Problem Solving Standard for Grades 9-12, enabling students to
build new mathematical knowledge through problem solving; solve problems
that arise in mathematics and in other contexts; apply and adapt a
variety of appropriate strategies to solve problems; and monitor and
reflect on the process of mathematical problem solving.
For background information elsewhere on our site, explore the
High School Algebra
area of the Ask Dr. Math archives. To find relevant
sites on the Web, browse and search
Basic Algebra
in our Internet Mathematics Library.
Access to these problems requires a Membership.
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A Triangle's Area
- Canadian Open Math Challenge 1999 via Tim Lang
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Algebra, difficulty level 3. Find the "b" values of two lines needed to form two congruent triangles of a given area.
... more>>
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Triangular Number Identities
- Terry Trotter
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Algebra, difficulty level 3. Prove two famous theorems of ancient number theory: the sum of any two consecutive triangular numbers is a square number, and the product of 8 and any triangular number, increased by 1, is a square number.
... more>>
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Tribonacci
- Terry Trotter
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Algebra, difficulty level 3. Find the second and third terms of a "Tribonacci" sequence.
... more>>
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Tribonacci Tribulation
- Steve Risberg
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Algebra, difficulty level 2. Given data describing a tribonacci sequence, find a missing number in
the sequence.
... more>>
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Trick-or-Treat Box
- Terry Trotter
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Algebra, difficulty level 1. Harvey and his classmates make trick-or-treat boxes in math class and use a special formula to find the volumes.
... more>>
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Two by Canoe
- Annie Fetter
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Algebra, difficulty level 3. Figure out what time Tashawn and Forrest need to start back downstream after paddling upstream for two days if they need to meet Forrest's mother at 4 pm on the third day.
... more>>
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Two for Two
- Annie Fetter
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Algebra, difficulty level 3. Two numbers have a ratio of 5:3. The larger number is 36 more than half the difference of the two numbers. What are the two numbers?
... more>>
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Two for Two More
- Annie Fetter
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Algebra, difficulty level 3. Two numbers have a ratio of 4:3. The greater number is 60 more than 8 times their difference. What could the two numbers be?
... more>>
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Two Ladders
- Terry Trotter
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Algebra, difficulty level 2. Find the lengths of two ladders, then find their "differences."
... more>>
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The Unhappy Carpenter
- Ethel Breuche
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Algebra, difficulty level 1. A carpenter agrees to be paid a certain amount of money when she works, and to repay money on the days she doesn't work. Find the number of days she worked if she earned $77.00.
... more>>
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Up the Down Elevator
- Ethel Breuche
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Algebra, difficulty level 2. Juanita has to use a freight elevator to deliver packages but can use the passenger elevator to return. What is her average speed for the entire trip?
... more>>
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Valentine Candy
- Ethel Breuche
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Algebra, difficulty level 2. A vendor who sells Valentine candy boxes wants to raise the price. For every twenty-five-cent increase he loses two customers. At what price should he sell the boxes to achieve the maximum profit?
... more>>
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The Variable Rectangle
- Terry Trotter and Friends
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Algebra, difficulty level 1. Increase a rectangle's width and decrease its length each by 1 and the area is decreased by 4. But decrease its width by 1 and increase its length by 2, and the area is increased by 16. What's the area of the original rectangle?
... more>>
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A Variable Triangle
- Steve Risberg
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Algebra, difficulty level 4. Given a triangle with side lengths of x + 2, x + 3, and 11, what can
we conclude about x?
... more>>
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Vexing Variables
- Steve Risberg
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Algebra, difficulty level 3. Use two algebraic statements involving three variables to find the
numeric value of the ratio of two of those variables.
... more>>
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Voter Turnout
- Steve Risberg
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Algebra, difficulty level 2. A group of students collected data on voter turnout for the recent
election and plotted graphs broken down by age groups. Can you match
each age group with its graph?
... more>>
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Walter's Weird Wages
- Terry Trotter
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Algebra, difficulty level 2. Walter's eccentric parents give their son his housework wages in a strange way. Can you determine how much he receives?
... more>>
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The Way the Crazy Crow Flies
- Janet Bowers
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Algebra, difficulty level 3. A crazy crow flies back and forth between two trains that are approaching each other on parallel tracks. How far does the crow fly?
... more>>
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Weighing Kittens
- Terry Trotter
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Algebra, difficulty level 2. Given some facts, figure out how many ounces each of seven kittens weighs.
... more>>
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The Weight of Bart's Brick
- Terry Trotter
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Algebra, difficulty level 1. Bart was asked by his construction foreman about the weight of a brick. Bart's answer befuddled his boss. (But not you.)
... more>>
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What's My Angle?
- Terry Trotter
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Algebra, difficulty level 3. Using concepts of vertical angles and supplementary angles, solve two quadratic expressions to find the measure of a given angle.
... more>>
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What's My Line?
- Terry Trotter
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Algebra, difficulty level 1. Given a set of eight points in the Cartesian plane, find the three that are collinear.
... more>>
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What's the Difference?
- Steve Risberg
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Algebra, difficulty level 3. Does multiplying a number by four always give you a greater number
than you started with?
... more>>
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What's the Point?
- Steve Risberg
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Algebra, difficulty level 3. Find all points on a given line such that they are a specified
distance from two points in the plane.
... more>>
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What's the Score?
- Terry Trotter
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Algebra, difficulty level 2. Find the final score of the football game between the Falcons and the Bears.
... more>>
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What's the Temperature
- Annie Fetter
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Algebra, difficulty level 1. At what temperature do you get the same answer, regardless of
whether
you use the Fahrenheit or the Celsius scale?
... more>>
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What's what?
- Terry Trotter (author unknown)
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Algebra, difficulty level 2. A poetical puzzle to ponder about: "What is WHAT?"
... more>>
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What Time Is It?
- Steve Risberg
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Algebra, difficulty level 3. Determine the angle between the hands of a clock at certain times,
and
find the times that generate a particular angle.
... more>>
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Winter Gold
- Terry Trotter
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Algebra, difficulty level 2. Given some clues, figure out how many gold medals were won by each country.
... more>>
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The World's Meanest Math Teacher
- Bill Graham
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Algebra, difficulty level 3. Students seated around a circular table are being systematically eliminated. What's the rule to follow to be the last one eliminated?
... more>>
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Wreck Tangle
- Steve Risberg
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Algebra, difficulty level 2. When the width of a given rectangle is tripled and the length is
doubled, the perimeter increases by 92 cm. Find the area of the
original rectangle.
... more>>
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X Marks the Spot
- Terry Trotter
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Algebra, difficulty level 3. A Spanish pirate buries his treasure on an island in a very mathematical manner. Can you locate the "X" spot?
... more>>
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