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Multiples are the numbers divisible by both numbers. LCM of 40 are
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The least common multiple of 10, 35 and 40 is 280. LCM is the smallest multiple that is exactly divisible by every member of a set of numbers.
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The lcm of two numbers is their product divided by their gcd (greatest common divisor). The Euclidean algorithm is a very efficient way of determining the gcd. It's not a "formula
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