Circles adding to 21 – NLVM http://www.mathszone.co.uk/images/thumbimg-114c.jpg
Make the intersecting circles add to 21. Numbers in intersections are whole numbers, less than 21

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Adding to 99 - NLVMAdding to 99 - NLVM http://www.mathszone.co.uk/images/thumbimg-115l.jpg Make the totals in the intersecting circles add to…
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<embed><a href='https://mathszone.co.uk/using-applying/puzzles-and-logic-problems/circles-adding-to-21-nlvm-3/' target='_blank'><p class='ff-style-highlight' style='font-size:1.3rem'>Circles adding to 21 – NLVM</p><img src='https://mathszone.co.uk/wp-content/uploads/thumbimg114c.jpg' width='100%' style='max-width:300px;'></a></embed>