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The lcm of 9 and 81 is 81.

- Find the prime factorization of 9

9 = 3 × 3 - Find the prime factorization of 81

81 = 3 × 3 × 3 × 3 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 3 × 3 × 3 × 3 - LCM =
**81**

Find least common multiple (lcm) of: 18 & 162 27 & 243 3 & 27 45 & 405 63 & 567 18 & 81 9 & 162 27 & 81 9 & 243 45 & 81 9 & 405 63 & 81 9 & 567

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