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Red Even

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Prime Magic

Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?

Magic Vs

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

You could use this sheet to record your magic Vs.
Have a go at putting the numbers into the V and then adding up each arm. Perhaps you can adjust the arrangement slightly to make the totals the same?
What do you notice about the number at the base of the V in all your magic Vs?