1)what is the LCM of 5,15,18
2) what is the LCM of 10,100,1000
3)What is the LCM of 6,9,12
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The least common multiple of 5, 15 and 18 is 90.
The least common multiple of 10, 100, 1000, 10,000 and 100,000 is 100,000.
Answer: LCM of 3, 6, 9, and 12 is 36.
Step-by-step explanation:
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Below in bold.
Step-by-step explanation:
1. 5, 15, 18
Write them as a product of prime factors:
5 = 5
15 = 3 * 5
18 = 2 * 3 * 3
The LCM = 2 * 3 * 3 * 5 = 18 * 5 = 90.
( Repeated primes are used only once in the calculation, other primes which are not repeated in other products must also be included in the LCM).
2. 10, 100, 1000
In this case 10 and 100 are factors of 1000, so:
LCM = 1000.
3. 6, 9 , 12
6 = 2 * 3
9 = 3 * 3
12 = 2 * 2 * 3
LCM = 2 * 2 * 3 * 3 = 36.
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