how many total balls in this pyramid???
http://i269.photobucket.com/albums/j...008/fb1x66.jpg
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how many total balls in this pyramid???
http://i269.photobucket.com/albums/j...008/fb1x66.jpg
30?
nope
16
28
25
28
20
there is one correct answer above
16 visible. But that's not the total in the pyramid.