LCM of 3 and 30 is 30. The LCM of any two integers in mathematics is the value that is evenly divisible by the two values. The smallest number among all common multiples of 3 and 30 is the LCM of 3 and 30. (3, 6, 9, 12,… ) and (30, 60, 90, 120, 150, 180,… ) are the first few multiples of 3 and 30, respectively. To find the LCM of 3 and 30, there are three typical methods: listing multiples, division method, and prime factorization.
Also read: Least common multiple
What is LCM of 3 and 30?
The answer to this question is 30. The LCM of 3 and 30 using various methods is shown in this article for your reference. The LCM of two non-zero integers, 3 and 30, is the smallest positive integer 30 which is divisible by both 3 and 30 with no remainder.
How to Find LCM of 3 and 30?
LCM of 3 and 30 can be found using three methods:
- Prime Factorisation
- Division method
- Listing the multiples
LCM of 3 and 30 Using Prime Factorisation Method
The prime factorisation of 3 and 30, respectively, is given by:
3 = 31 and
30 = (2 × 3 × 5) = 21 × 31 × 51
LCM (3, 30) = 30
LCM of 3 and 30 Using Division Method
We’ll divide the numbers (3, 30) by their prime factors to get the LCM of 3 and 30 using the division method (preferably common). The LCM of 3 and 30 is calculated by multiplying these divisors.
| 2 | 3 | 30 |
| 3 | 3 | 15 |
| 5 | 1 | 5 |
| x | 1 | 1 |
No further division can be done.
Hence, LCM (3, 30) = 30
LCM of 3 and 30 Using Listing the Multiples
To calculate the LCM of 3 and 30 by listing out the common multiples, list the multiples as shown below
| Multiples of 3 | Multiples of 30 |
| 3 | 30 |
| 6 | 60 |
| 9 | 90 |
| …. | 120 |
| 30 | 150 |
The smallest common multiple of 3 and 30 is 30.
Therefore LCM (3, 30) = 30
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LCM of 3 and 30 Solved Example
Question: The product of two numbers is 90. If their GCD is 3, what is their LCM?
Solution:
Given: GCD = 3
product of numbers = 90
∵ LCM × GCD = product of numbers
⇒ LCM = Product/GCD = 90/3
Therefore, the LCM is 30.
The probable combination for the given case is LCM(3, 30) = 30.
Frequently Asked Questions on LCM of 3 and 30
What is the LCM of 3 and 30?
List the methods used to find the LCM of 3 and 30.
If the LCM of 30 and 3 is 30, Find its GCF.
Since the LCM of 30 and 3 = 30
⇒ 30 × GCF(30, 3) = 90
Therefore, the greatest common factor = 90/30 = 3.
How to Find the LCM of 3 and 30 by Prime Factorization?
⇒ LCM of 3, 30 = 2 × 3 × 5 = 30.
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