Consider a triangular pyramid of balls, constructed by placing each ball (except those on the bottom) in the hollow formed by the three balls under it. If such a pyramid has 12 balls on the side of the bottom level, how many balls in total does it contain?
the first 4 rows are 78,66,55,45 each time the triangle goes up the number of balls ber sections of the pyraimid goes down 12,11,10,9... and so one until u get to the the top where there is 366 balls in the total tower of balls
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