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Type in the correct answer to 30 + 10 and you get the next problem. After answering 5 correctly ...(see next image)
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...you collect the trash by shooting it with a tractor beam.
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The object here is to create five equalities from the set of numbers and operators given. Blasternaut will jump on a column to move each of the numbers in that column down one row. Jump twice and the number in the bottom-most row will be zapped. Numbers in the row above that one will be recycled to the top of the column.
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Maneuver Blasternaut through the cave maze by catching water droplets that change the amount on his number label. That label must be a number in between the numbers on the ledges in order to pass through.