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University of Cambridge: Nrich: Watching the Wheels Go `Round and `Round
Use the formula for the circumference of a circle to solve the challenge of this problem. The solution is available at this one page website.
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University of Cambridge: Nrich: Red Balloons, Blue Balloons
Use your problem solving skills to help Katie and Will solve the problem they have with blowing up their balloons until they pop. See if you can discover the solution on your own at this one page website. Then check the solution...
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University of Cambridge: Nrich: Spelling Circle
On this one page website use trial and error to find the words hidden in the spelling circles. Check your solution right at the website.
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University of Cambridge: Nrich: Amy's Dominoes
On this one page website sharpen your logic and problem solving skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Twenty Divided Into Six
On this one page website sharpen your logic and addition fact skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Rectangle Tangle
On this one page website sharpen your logic and fractional part skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Is It Magic or Is It Maths?
On this one page website sharpen your logic and pattern recognition skills while working on this magic challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: What's It Worth?
Use this one page website to practice the problem solving strategy of trial and error! The solution is available right at the website.
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University of Cambridge: Nrich: Shapes on the Playground
On this one page website the problem will require you to use your problem solving skills to find your solution. You can then check it right at the website against the solution they have available.
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University of Cambridge: Nrich: Where Are They?
Test your logic, polygon properties, and pattern recognition skills working on this challenge. Solution included.
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University of Cambridge: Nrich: Plates of Cookies
As you start to work on this problem, keep in mind that in England cookies are called biscuits. Solution provided.
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University of Cambridge: Nrich: A Flying Holiday
Some may think this problem is for the birds but you will need to use your problem solving skills to come up with a reasonable answer. Then check this one page website for the solution.
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University of Cambridge: Nrich: A Magical Number Maze!
On this one page website sharpen your logic and problem solving skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Disappearing Square
This one page website explains how to find the area of a triangle with an interactive graphic. It then offers a challenge. The solution is available right at the website.
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University of Cambridge: Nrich: A Bit of a Dicey Problem
Short website offers a look into the theoretical probability of tossing dice. Several questions related to the throwing of dice are included.
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University of Cambridge: Nrich: The Hare and the Tortoise
On this one page website sharpen your logic and rate measurement skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Augustus' Age
Use a simple formula to help you figure out the age of the mathematician Augustus de Morgan. When done, check your results against the solution.
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University of Cambridge: Nrich: Four Colors Problem
See if you can arrange the cubes according to the directions to solve this challenge. This one page website includes the solution.
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University of Cambridge: Nrich: Color in the Square
On this one page website use the graphics right online to help you solve this problem. You can check your solution right at the website.
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University of Cambridge: Nrich: Home Time
Use the clues and logic to solve this car pool problem. The solution provided allows you to check your results.
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University of Cambridge: Nrich: A Shapey Network
Sharpen your problem solving and logic skills on this network activity. There is a "Printable Page," link if you want to print it out to help you with your strategy.
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University of Cambridge: Nrich: Routes 1 and 5
Sharpen your logic and basic arithmetic skills while working on this challenge. Solution.
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University of Cambridge: Nrich: Path to the Stars
See if you can solve this challenge with a 5 point star. What about a 6 point star? 7? 8? 9? The one page website gives you the solution so that you can check your answer.
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University of Cambridge: Nrich: Find a Path
Sharpen your problem solving and logic skills on this network activity, Find A Path. There is a "Printable Page," link if you want to print it out to help you with your strategy.