Mathematics, 30.01.2020 07:50 jhanes1983

The excercise goes like" there are 20 books on the lowest shelf, 18 on next one, 16 on next one etc., till the top shelf on which there is 4 books. how many books are on this bookshelf? "

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The excercise goes like" there are 20 books on the lowest shelf, 18 on next one, 16 on next one etc....

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