University of Cambridge
University of Cambridge: Nrich: Three Block Tower
At this one page website you have to use your logic. Then you can figure out how many towers can be built using three different colored blocks without repeating any color sequence.
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University of Cambridge: Nrich: Whose Face?
This is a logic and reasoning problem to help you sharpen your problem solving skills on this one page website. Now just "face" it and see if you can find the solution to "Whose Face"!
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University of Cambridge: Nrich: Mixed Up Socks
Your reasoning skills will come in handy as you find solutions to these "sock" problems. Solutions are available on this one page website.
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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.
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University of Cambridge: Nrich: Seven Pots of Plants
On this one page website sharpen your logic skills while working on this flower pot labels mix up challenge. The solution is available to double check your solution.
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University of Cambridge: Nrich: 1, 2, 3, 4, 5
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: 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.
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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: Elf Suits
Reasoning will help you figure out the various combinations of elf suits at this one page website. Check your solution against the solution given and see if they agree with you!
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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.
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University of Cambridge: Nrich: Chocs, Mints, Jellies
On this one page website, logic and other problem solving skills will help you find a variety of solutions to this sweet dilemma. The University of Cambridge provides possible solutions to aid you in your decision making.
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University of Cambridge: Nrich: Dining Ducks
This problem will quack you up. On this one page website use those problem solving skills to check the reasonableness of your answer. The solution is available right at the website.
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University of Cambridge: Nrich: Snails' Trails
Follow the guidelines and figure out the logic needed to bring these two snails together! A solution is available to check your results.
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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.
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University of Cambridge: Nrich: Briefcase Lock
Use logic and reason to figure out what the correct combination of numbers are for the locked briefcase. At this one page website you can also check the solution.
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University of Cambridge: Nrich: Whose Sandwich?
On this one page website logic and reason will help you figure out who ordered which sandwich. Check your results against the solution they provide at this website.
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University of Cambridge: Nrich: Highest and Lowest
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: Zargon Glasses
On this one page website using logic you can help Zump figure out which combination of glasses go to which members of the 9 families who ordered glasses one day. Check your answer against the solution provided by the website.
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University of Cambridge: Nrich: Train Timetable
Reasoning will help you figure out the timetable for the trains in this problem. Construct a table and see if it matches the solution this one page website provides.
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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.
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University of Cambridge: Nrich: Team Scream
This logic problem will require you to figure out a variety of combinations. The solution is available on this one page NRich website.
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University of Cambridge: Nrich: Calendar Cubes
Solve this problem using your reasoning problem solving skills. The solution is available on this one page website.
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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.
Education Place
Houghton Mifflin: Eduplace: Justifying Answers
Justifying answers, easy enough to an adult, can be difficult for a child. This is a great place to help you teach the concept of "reasonableness" of an answer. There are sections covering lesson plans, tips & tricks, and...