LCM of 18 and 25
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
It is easy to find the LCM of 18 and 25 with the help of the handy LCM Calculator. You have to enter 44, and 60 as inputs to avail the LCM 450 as output. Here you can check the answer for Find the LCM of 18 and 25.
What is LCM of 18 and 25
Given Numbers are 18, 25
We can find the LCM of 18, 25 using the brute force method, prime factorization method, or GCD method.
To use brute force method, list the multiples of 18 and 25
Multiples of 18 =18,36,54,72,90,108,126,144,162,180,198,216,234,252,270,288,306,
Multiples of 25 =25,50,75,100,125,150,175,200,225,250,275,300,325,350,375,400,425,
Now, get the least common multiple of 18, 25 which is 450
So, the LCM of 18, 25 is 450.
Least Common Multiple (LCM) of 18 and 25 with the help of Prime Factorisation
One method for determining the LCM of 18 and 25 is to compare the prime factorization of each number. You can find the prime factorization for each number by following the instructions below:
Here is 18's prime factorization:
| 2 | 18 |
| 3 | 9 |
| 3 | 3 |
| 1 |
Prime factors of 18 are 2,3.
18 = 21×32
And this is 25's prime factorization:
| 5 | 25 |
| 5 | 5 |
| 1 |
Prime factors of 25 are 5.
25 = 52
When comparing the prime factorization of these two numbers, look for the highest power to which each prime factor is raised. In this case, the following primary factors must be considered: 2,3,5
.21×32×52 = 450
This shows that the LCM of 18 and 25 is 450.
How to Calculate the LCM of 18 and 25 Using Common Multiples
The first step in determining the Least Common Multiple of 18 and 25 is to generate a list of multiples for each number.
Lets look at the multiples of these two numbers, 18 and 25:
Lets look at the first ten multiples of these numbers, 18 and 25:
18,36,54,72,90,108,126,144,162,306 are the first ten multiples of 18.
25,50,75,100,125,150,175,200,225,425 are the first ten multiples of 25.
You can continue to list the multiples of these numbers until you find a match. Once you have found a match, or several matches, the Least Common Multiple is the smallest of these matches. The first matching multiple(s) of 18 and 25, for example, are 216, 306, and 400. 450 is the least common multiple since it is the smallest.
18 and 25 have an LCM of 450.
Least Common Multiple of 18 and 25 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18 and 25, than apply into the LCM equation.
GCF(18,25) = 1
LCM(18,25) = ( 18 × 25) / 1
LCM(18,25) = 450 / 1
LCM(18,25) = 450
Related Least Common Multiples of 18
Related Least Common Multiples of 25
Frequently Asked Questions on LCM of 18 and 25
1. What is the LCM of 18 and 25?
The LCM of 18 and 25 is 450.
2. How to find the lowest common multiple of 18 and 25?
To find the lowest common multiple of 18 and 25, we have to get the multip;es of both numbers and identify the least common multiple in them which is 450.
3. What are the Factors of 18?
Answer: Factors of 18 are 1, 2, 3, 6, 9, 18. There are 6 integers that are factors of 18. The greatest factor of 18 is 18.
4. What are the Factors of 25?
Answer: Factors of 25 are 1, 5, 25. There are 3 integers that are factors of 25. The greatest factor of 25 is 25.
5. How to Find the LCM of 18 and 25?Answer:
Least Common Multiple of 18 and 25 = 450
Step 1: Find the prime factorization of 18
18 = 2 x 3 x 3
Step 2: Find the prime factorization of 25
25 = 5 x 5
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 450 = 2 x 3 x 3 x 5 x 5
Step 4: Therefore, the least common multiple of 18 and 25 is 450.