University of Cambridge
University of Cambridge: Nrich: Make 37
Sharpen your logic and addition skills while working on this challenge. Solution.
University of Cambridge
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.
University of Cambridge
University of Cambridge: Nrich: Game Fifteen
Sharpen your problem solving and strategy skills playing this interactive game, Fifteen. The rules are simple but the game requires some thinking if you want to beat the computer. There is a "Printable Page," link if you want to print it...
University of Cambridge
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.
University of Cambridge
University of Cambridge: Nrich: Three Way Mix Up
Follow the rules and see if you can solve this problem about 3 different color tile arrangements. As always the solutions is available on this one page website.
University of Cambridge
University of Cambridge: Nrich: Game: Tandem
Sharpen your problem solving and strategy skills playing this game. There is a "printable page" link if you want to print it out to help you work with the problem.
University of Cambridge
University of Cambridge: Nrich: Game Pumpkin Patch
Sharpen your problem solving and strategy skills playing this Somali game, Pumpkin Patch. The rules are simple but the game requires some thinking. There is a "Get Printable Page," link at the top to print out the materials you need.
University of Cambridge
University of Cambridge: Nrich: Hand Span
Use this one page website to practice measuring things using nonstandard units of measurement. There is a solutions page that is right at the website for more information.
University of Cambridge
University of Cambridge: Nrich: Game Khun Phaen Escapes to Freedom
This interactive game is based on a famous character in a Thai legend. See if you can figure out how he escaped! You will have to use your problem solving and spatial relationship skills to figure out this one.
University of Cambridge
University of Cambridge: Nrich: Eleven?
Only by replacing these letters with the correct digits can you make this problem add up correctly! The solution is located right at this one page website.
University of Cambridge
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: Butterfly Flowers
This one page website offers a challenge that will require you to use your problem solving skills. There are teacher tips and the solution available to help.
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 Stones Game
Sharpen your problem-solving and strategy skills while playing the interactive game, Two Stones. The rules are simple, but the game requires some thinking if you want to beat the computer. Watch as the play proceeds to see what it takes...
University of Cambridge
University of Cambridge: Nrich: Game Counter Roundup
Sharpen your problem solving and strategy skills playing this interactive game, Counter Roundup. The rules are simple but the game requires some thinking if you want to beat the computer. There is a "Get Printable Page," link at the top...
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.
University of Cambridge
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.
University of Cambridge
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.
University of Cambridge
University of Cambridge: Nrich: Money Bags
Practice your problem solving skills while you help Ram figure out how many pennies to put in each bag. The solution is right on this one page website.
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.
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.
National Council of Teachers of Mathematics
Nctm: Figure This: Keeping Cool
Is it better to by block ice or crushed ice? Use your logical reasoning and measurement skills to solve this challenge that compares surface area of block ice and the same block cut into three cubes. A one page activity from the NCTM...
Other
Websudoku
A fun puzzler to get any mind thinking logically! Try many levels of puzzles using the following rules: "Enter digits from 1 to 9 into the blank spaces. Every row must contain one of each digit. So must every column, as must every 3x3...
Dartmouth College
Dartmouth College: Mqed: The Hand and the Key
The learning resource explores the mathematical riddles embedded in the walls of a palace.
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