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What is the LCM of 81 and 72?

Updated: 8/21/2019
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Wiki User

8y ago

Best Answer

648

Express each number as their prime compositions in power notation:

72 = 2332

81 = 34

For LCM take the highest power of each prime across the numbers:

LCM = 2334

= 8 x 81

= 648

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13y ago
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8y ago

648

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Q: What is the LCM of 81 and 72?
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