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27 June, 07:21

Mari has 28 wooden cubes she what's to stack them to form a triangle each row will have one block fewer then the row below it how many blocks will be in the bottom row of the pyramid?

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Answers (2)
  1. 27 June, 08:44
    0
    7 Have the best day ever!
  2. 27 June, 11:05
    0
    This is a problem involving the sum of numbers

    one way is to just add them

    1 row=1

    2 row=3

    3 row=6

    4 row=10

    5 row=15

    6 row=21

    7 row=28

    each row has the number of blocks that is the row

    7th row=7 blocks

    so 7 blocks
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