A game for two players who take turns to select two numbers that add up to a prime number. |
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Enter the names of the players.
Player 1:
Player 2:
StartEach adjacent pair of numbers on the line must add up to a prime number.
THE LINE
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Transum.orgThis web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available. Please contact me if you have any suggestions or questions. |
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Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician? Comment recorded on the 12 July 'Starter of the Day' page by Miss J Key, Farlingaye High School, Suffolk: "Thanks very much for this one. We developed it into a whole lesson and I borrowed some hats from the drama department to add to the fun!" Comment recorded on the 1 February 'Starter of the Day' page by M Chant, Chase Lane School Harwich: "My year five children look forward to their daily challenge and enjoy the problems as much as I do. A great resource - thanks a million." |
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Numeracy"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables." Secondary National Strategy, Mathematics at key stage 3 |
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There are 385072 ways of arranging the numbers 1 - 18 in a circle so that the sum of each pair of adjacent numbers is prime. Here is one of the possible ways
1,6,5,2,3,10,9,8,11,12,17,14,15,16,7,4,13,18.
See Bernardo Recamán’s Primes in a Circle Puzzle.
See Scallywags and Scoundrels for a puzzle requiring the numbers 1 - 12 to be arranged in a Prime-Sum Circle.
See Square Pairs Game for a similar game involving square numbers.
See Square Pairs for the related lesson Starter.
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