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Weekly Problem 45 - 2009

Stage: 2 and 3 Short Challenge Level: Challenge Level:1
The number of bunches must divide the number of white roses, the number of yellow roses and the number of red roses. The highest common factor of $24$, $36$ and $42$ is $6$, so the most bunches Flora can make is $6$, each consisting of $4$ white, $6$ yellow and $7$ red roses.

This problem is taken from the UKMT Mathematical Challenges.

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