University of Cambridge
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.
University of Cambridge
University of Cambridge: Nrich: Creating Cubes
On this one page website use a table to help you organize the information so that you can solve this cube problem. When you are finished you can check your answer 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: Plates of Cookies
As you start to work on this problem, keep in mind that in England cookies are called biscuits. Solution provided.
University of Cambridge
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: 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: Reach 100
This one page website offers a challenge that will require you to use your problem solving skills. The solution is available right at the website.
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University of Cambridge: Nrich: Back to the Planet of Vuv
You will probably need to make a list to solve the challenge at this one page website.
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: Sissa's Reward
On this one page website use a table to help you solve this problem about the chess board and grains of rice. The solution is available right on the website.
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University of Cambridge: Nrich: Alphabet Blocks
Help Santa and the elves keep track of how many blocks they need for their alphabet blocks. Solution provided.
University of Cambridge
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.
University of Cambridge
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.
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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: 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.
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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.
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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.
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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.