I'm editing a math word problem that has the following ambiguous set up.
A florist has 18 carnations, 24 daisies, and 12 lilies. She wants to make flower arrangements that each have the same number of each type of flower.
The question is about greatest common factors, so the intended interpretation is that each arrangement has c carnations, d daisies, and l lilies. However, the second sentence can also be interpreted as meaning each arrangement has n carnations, n daisies, and n lilies.
How can I reword the second sentence to ensure the first interpretation without resorting to technical descriptions like above? (Added difficulty: the question is for 6th graders.)
I should add that test items are best when they are clear and concise. I'm looking for a solution that is both.