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the lowest common number of 18 and 30 is 90.
explanation:
the 18 times table:
18, 36, 54, 72, 90, 108...
the 30 times table:
30, 60 90, 120...
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Alternatively, using prime factorisation:
factorise the numbers into their prime factors in power format
The LCM is the product of all the different primes to the highest power that appears across all the primes:
18 = 2 x 3²
30 = 2 x 3 x 5
lcm = 2 x 3² x 5 = 90
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∙ 6y ago
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∙ 11y ago90
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