Find the sum of all the common factors of 15 and 55.
Multiply the result by the first common multiple of 4 and 6.
What is the answer?
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Answer:
Step-by-step explanation:
To sum up, the gcf of 15 and 55 is 5. In common notation: gcf (15,55) = 5.
The multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, . . .
The multiples of 6: 6, 12, 18, 24, 30, 36, . . .
The common multiples of 4 and 6 (see values in both lists): 12, 24, ...
The least common multiple (LCM) of 4 and 6: 12
Now --
The prime factors of 4: 2*2
The prime factors of 6: 2*3
Include each term only once, the LCM of 4 and 6 is 2*2*3=12.
Note that 12 is divisible by 4 and 12 is divisible by 6
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