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lcm(8 12 13) = 312 Using prime factorisation: 8 = 2³ 12 = 2² x 3 13 = 13 lcm = 2³ x 3 x 13 = 312
LCM of 8, 5 and 12 is 120...
LCM of 8 and 9 and 12 is 72.
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LCM is 120, which is the multiple of the highest power of each prime in the given numbers (23 x 3 x 5).