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University of Cambridge: Nrich: Got It
Sharpen your logical thinking and see if you can figure out the strategy to get to the target number before the computer.
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University of Cambridge: Nrich: Instant Insanity
Excellent interactive challenge working with cube nets to stack them in a specific order. Manipulate the cubes online to solve the problem.
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University of Cambridge: Nrich: Irrational Proof
This site contains a proof that the square roots of all prime numbers are irrational.
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University of Cambridge: Nrich: Cubes Within Cubes
On this one page website sharpen your logic, geometry, spatial thinking, 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: Triangles to Tetrahedra
Given an unlimited number of a specific type of equilateral, isosceles, and right triangles create as many tetrahedra as are possible. Includes printout.
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University of Cambridge: Nrich: Game Do You Measure Up?
This interactive game gives you a variety of measuring tools and measuring opportunity. For this game of chance you choose the correct tool for the job that needs to be measured. Everything you need for this game is listed and/or...
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University of Cambridge: Nrich: Alquerque an Egyptian Math Game
This is a board game played in Egypt in 1400 BCE. It requires strategy and to think several moves ahead.
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University of Cambridge: Nrich: Fractional Triangles
On this one page website sharpen your logic and equivalent fraction skills while working on this challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: Net Cuts
In this enrichment game, the nets for nine solids are displayed. The twist is that each net has been cut into two pieces. The challenge is find the pieces that go together.
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University of Cambridge: Nrich: Konigsberg Plus
See if you can solve this classic problem that Leonhard Euler first presented in 1736. Use the interactive section of this website to help you.
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University of Cambridge: Nrich: Seating Arrangements Plus!
Using your reasoning skills and the clues provided, try to figure out who is sitting where at this table of six. Check the solution and see if you are correct. You can choose similar games and math problems on this page, or choose math...
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University of Cambridge: Nrich: Read This Page
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: Introduction to Logo Programming
Excellent introduction to LOGO programming. Get started learning the basics of how to write procedures using the Logo programing language to get that "turtle" to move around and draw pictures. It sharpens your problem-solving,...
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University of Cambridge: Nrich: Introduction to Logo Programming
Excellent introduction to LOGO programming. Get started learning the basics of how to write procedures using the Logo programing language to get that "turtle" to move around and draw pictures. It sharpens your problem-solving,...
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University of Cambridge: Nrich: Beginning Logo Programming
A helpful compilation of lessons sequenced to help you get started learning the Logo programming language. Logo is used for writing procedures and superprocedures. It sharpens your problem-solving, sequencing, and geometry skills.
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University of Cambridge: Nrich: Virtual Geoboard
Use this virtual geoboard to explore the attributes of various polygons. This would work well on an interactive whiteboard.
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University of Cambridge: Nrich: Wonky Watches
Sharpen your logic and time skills while working on this challenge. Solution available.
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University of Cambridge: Nrich: Wag Worms
Use this challenge to see how many unique shapes can be created using exactly 5 cubes. At this one page website you can also check your results.
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University of Cambridge: Nrich: Practice Run
Sharpen your logic and fraction skills while working on this challenge. Solution.
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University of Cambridge: Nrich: Bike Ride
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: Romantic Riddle
See if you can figure out the solution to this romantic riddle. You can find the solution right at this one page website once you have formulated your own.
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University of Cambridge: Nrich: Make 100
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: Find the Fake
Find the fake bar of gold in this problem and you are only allowed to use the scale twice. Can you do it? Once you have your solution check this one page website to verify it.
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University of Cambridge: Nrich: 1 Step 2 Step, Fibonacci
See if you can find the patterns on the staircase. Mr. Fibonacci would be so proud to know you found the solution. You can check your solution right at this nifty one-page website.