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5 rows with 14 in each row7 rows with 10 in each row
26 shells, 3 rows -> 5 per row with 1 remaining 19 pennies, 5 rows -> 3 per row with 4 remaining 17 balloons, 7 rows -> 2 per row with 3 remaining
Sort the rows; the duplicates will then be grouped together. Scan from the top row; if the next row is a duplicate of the current row, remove it. If the next row is not a duplicate, make it the current row. Repeat until there is no next row. When complete, all the duplicates will have been removed.
Six ways. 15 rows of 2 trees 6 rows of 5 trees 3 rows of 10 trees and 2 rows of 15 trees 5 rows of 6 trees 10 rows of 3 trees * * * * * How about 1 row of 30 trees and 30 rows of 1 tree each?
Carefully arrange 12 rows with 8 coins in each row.