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Prime factors: 18 = 2 x 3 x 3, 15 = 3 x 5 Ignore one of the common factor 3 and multiply others, ie 2 x 3 x 3 x 5 = 90 (5 x 18, 6 x 15)
It is: 90

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7y ago
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Q: What is the lowest common multiple of 18 and 15?
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