Answers

2014-07-15T15:57:41+08:00
Because 17 x 13 = 221
so, there are 221 magazines =)
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2014-07-15T21:42:14+08:00
Multiply the rows of magazines to the number of magazines for each row.
   17 rows of magazine
X 13 magazines/row
221 magazines are in the aisle
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