The LCM is: 12
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The common multiples of 5 and 6 are the multiples of their lowest common multiple (which is 30), so there are infinitely many common multiples of 5 and 6. The first five are: 30, 60, 90, 120, 150.
The multiples of 4 are 4, 8, 12, 16, 20, 24 The multiples of 6 are 6, 12, 18, 24 This means that the LCM of 4 and 6 is actually 12 and not 24 because 12 is the lowest shared multiple of these two numbers (4 and 6).
To find the least common denominator, list the multiples of each denominator. The lowest one they have in common is the LCD.For example:2/3 and 3/4:The multiples of 3 are: 3, 6, 9, 12, 15, 18, 24...The multiples of 4 are: 4, 8, 12, 16, 20, 24...The common multiples are 12 and 24. Since 12 is the least, it is the LCM.
The first two common multiples of the pair of numbers 4 and 6 are: 12, 24.
The Least Common Multiple (LCM) for 4 6 is 12.