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14 September, 12:52

Marta made 4 stacks of wooden blocks. The first stack was 4 blocks tall. The second stack was 7 blocks taller than the first. The third stack was 2 blocks shorter than the second stack, and the last stack was 7 blocks taller than the third stack. How many blocks did Marta use in all?

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  1. 14 September, 13:20
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    30 blocks.

    Step-by-step explanation:

    1st tower: 4 blocks

    2nd tower: 11 blocks (4+7)

    3rd tower: 9 blocks (11-2)

    4th tower: 16 blocks (9+7)

    4+11+9+16=30
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