University of Cambridge
University of Cambridge: Nrich: Penta Primes
Using only the single digits listed make as many prime numbers as you can for this challenge. After you have your list you can check this one page website and it will show you the solution.
University of Cambridge
University of Cambridge: Nrich: Buckets of Thinking
Trial and error is just one of the problem solving strategies that you could use to solve this bucket problem. After you finish view the solution at this one page website.
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University of Cambridge: Nrich: Two Dice
Use your problem solving skills to work on this problem that has to do with dice. The solution is right on this one page website.
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University of Cambridge: Nrich: Three by Three
Push your problem-solving skills to the limit. Arrange 3 red, 3 blue and 3 yellow counters into a three-by-three square grid, so that there is only one of each color in every row and every column.
University of Cambridge
University of Cambridge: Nrich: 5 on the Clock
Use your math skills to solve this problem involving a digital clock face. Solution included.
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University of Cambridge: Nrich: Magic Triangle
Use your problems solving skills to make everything add up correctly for this challenge. The solution is right at this one page website.
University of Cambridge
University of Cambridge: Nrich: 1 to 8
Use the clues and problem solving strategy, trial and error, to solve this problem. When you have your solution you can check it right on this one page website.
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University of Cambridge: Nrich: What Shape and Color?
Fill in the chart and see which shapes and which colors belong in which rows and columns. The solution is readily available at this one page website.
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University of Cambridge: Nrich: The Lily Pond
Using your problem solving skills find the best way for Freddie to visit Sammy. On this one page website the solution is right there for you when you have found a solution.
University of Cambridge
University of Cambridge: Nrich: Fair Exchange?
On this one page website from the University of Cambridge, you can sharpen your problem solving skills while you figure out equivalent values for the amounts shown. The solutions appear on the interactive machine.
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University of Cambridge: Nrich: Six Is the Sum
You will probably want to make a list to figure out the solution to this problem. There are teacher notes and the solution right at this one page website.
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University of Cambridge: Nrich: On the Edge
On which polyhedra are you able to trace along the edge without retracing any edge? When you have found the correct polyhedra then check the solution provided for you right at this one page NRich website.
University of Cambridge
University of Cambridge: Nrich: Ten Green Bottles
Sharpen your problem solving skills and find the solution to the challenge on this one page website. You might want to make a list. Once you have your solution you can check the website and see if it agrees with their solution.
University of Cambridge
University of Cambridge: Nrich: Page Numbers
Exactly 195 digits have been used to number the pages in a book. How many pages does the book have? Sounds simple enough--if you have the right problem-solving skills. Solution provided.
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University of Cambridge: Nrich: Shutting Puzzle
Sharpen your problem solving skills and figure out a solution for this interesting problem. The solution is on this one page website so that you can check your answer.
University of Cambridge
University of Cambridge: Nrich: Single Track
See if you can figure out how to get two trains on a single track past each other using only a very short siding. Check your results right on this one page websites to see if your answer works.
University of Cambridge
University of Cambridge: Nrich: Magic Circles
Use your problem solving skills to figure out this challenge. A number of solutions are available right at this one page website.
University of Cambridge
University of Cambridge: Nrich: Two Dots
Sharpen your problem-solving skills with this challenge that has you place dots on a diagram so that only two are on each straight line.
University of Cambridge
University of Cambridge: Nrich: Number Juggle
Use those problem solving skills to find a solution to this triangle problem. When you have your solution you can check it right on this one page website.
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University of Cambridge: Nrich: Numerically Equal
The challenge for this problem is to see if you can find rectangular shapes that have the same number for their perimeter and area. Solutions are available at this one page website.
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University of Cambridge: Nrich: 6 Beads
Use the diagram on this one page website to solve the problem. There are teacher notes and the solution is only a click away.
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University of Cambridge: Nrich: Biscuit Cookie Decorations
Solve this problem keeping in mind that cookies are called biscuits in England. Solution included.
University of Cambridge
University of Cambridge: Nrich: Bunny Hop
You will want to "hop" right on this problem and see if you can find a solution at this one page website. Then you can check it right there.
Help Algebra
Help algebra.com: Problem Solving Strategies
The steps for solving word problems are presented here along with suggestions of how to carry out each step. Learn how to understand, plan, write equations, solve and check each time you work a word problem.