darlingtesla15 darlingtesla15

16-09-2016
Mathematics

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cannonballs are stacked in a pyramid shape with a triangular base of 5 cannonballs on a side.How many cannonballs in all are in the stack?

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00crystallavariver 00crystallavariver

16-09-2016

simply add 5,4,3,2, and 1 together to get 15. each row gets smaller by 1, so simply keep adding until you get to 0.

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