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The least common multiple of the numbers 16, 15 and 12 is 240.
Oh, dude, let me put on my detective hat for this riveting mystery. So, Sally likes numbers that are perfect squares but not numbers that are just one more than a perfect square. In this case, she must like 144 because it's a perfect square, but not 145 because it's just one more. Case closed, Sherlock.
Two or more numbers are normally needed to find the LCM
The least common multiple of the numbers 612 and 15 is 3,060.The least common multiple of the numbers 6, 12 and 15 is 60.
All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors because they are factors that the numbers have in common. 3 is a factor of 12. 3 is a factor of 15. 3 is a common factor of 12 and 15.