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Magic squares

(3 Posts)
Shineyshoes10 Wed 20-Jan-16 13:24:33

DS isn't at school but we've got some work to do at home. A few of the worksheets are magic squares. The first few were easier and he could just see what numbers went where. But the last 2 sheets are harder he can't just spot them and doesn't know where to start.

How do I explain how you go about solving them without confusing him. My method of trial and error would frustrate him.

fredfredgeorgejnrsnr Wed 20-Jan-16 13:34:56

First work out what the number must be that each row / column has to add up to, ie add up all the numbers one to twenty-five and divide by the number of rows/columns that will then tell you immediately any with 4 of the 5 already filled out so:

65 = ? + 22 + 25 + 2 +13

So there's a 3 - in that row, as more numbers are known each row / column / diagonal will only have one missing number and can be easily filled.

Shineyshoes10 Wed 20-Jan-16 13:47:37

You can have a star sticker wink. Thank you. I'm off to cry I can't do primary level maths.

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