answersLogoWhite

0


Best Answer
Copy

To make this easier, let's first factor 18 and 21 into their prime factors:

18=2*3^2

21=3*7

Now it's very easy to find the LCM and GCF. The LCM is 2*3^2*7=126, and the GCF is 3.

User Avatar

Wiki User

โˆ™ 2010-06-11 15:01:41
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Add your answer:

Earn +5 pts
Q: What is the LCM and the GCF of 18 and 21?
Write your answer...
Submit

Related Questions

What is the LCM and GCF of 18 21 36?

The GCF is 3. The LCM is 252.


The GCF and LCM of 10 and 18?

The GCF of 10 & 18 is 2.The LCM of 10 & 18 is 90.


What is the LCM and GCF of 12 18 and 24?

LCM(12, 18, 24) = 72; GCF(12, 18, 24) = 6.


What is the GCF and LCM of 3 and 7?

LCM 21, and GCF =1


What is the difference between the GCF and LCM of 18 and 360?

GCF of 18 and 360 is 18 LCM of 18 and 360 is 360


What is the gcf and the LCM of 21-26?

The gcf and LCM of 21 and 26 are 1 and 546 respectively


What is the gcf and LCM of 18 24 and 30?

The GCF is 6. The LCM is 360.


What is the gcf LCM of 18 45?

The LCM is 90. The GCF is 9.


What is the GCF and LCM of 18 and 6?

The LCM of these numbers is 18. LCM is Least Common Multiple. The GCF of these numbers is 6. GCF is Greatest Common Factor.


The LCM of 9 and 18 is 18 what is the gcf?

The GCF is 9.


What is the GCF and LCM of 6 and 21?

The LCM of 6 and 21 is 42. Their GCF is 3.


What is the LCM of 21 and 18?

The LCM of 21 and 18 is 126.


What is the LCM and GCF of 24 18 and 30?

The LCM is 360. The GCF is 6.


What is the LCM and GCF of 18 24 and 30?

The LCM is 360. The GCF is 6.


LCM and GCF of 21 and 33?

The GCF is 3.


What is the GCF and LCM of 18 and 6v?

6 and 18v, respectively.


What is the GCF and LCM of 18 and 360?

The LCM is 360.


What is LCM of 98 and 21?

Gcf: 7 lcm: 294


What is the GCF of 216 and 234?

The GCF is 18.


What is the LCM of 21 42 18?

LCM(21, 42, 18) = 126


What is the GCF and LCM of 18 and 24?

6 and 72, respectively.


What is the GCF of 3 9 and 21?

The GCF is 3. The LCM is 63.


What is the LCM and gcf of 18 and 360?

Product of two numbers a and b = LCM(a,b) x GCF(a,b)...(1)Here, product of 18 and 360 = 6480Now, we shall find GCF of 18 and 360 by using the method of prime factorization.Prime factorization of 18 = 2x3x3Prime factorization of 360 = 2x2x2x3x3x5It is clear from the prime factorization that gcf = 18Now using (1) we can find LCM:LCM(18,360) = Product of 18 and 360/GCF(18,360) = 6480/18 = 360So, LCM and GCF of 18 & 360 is 360 and 18.Also, it is important to note that 360 is divisible by 18 then GCF is 18 and LCM is 360.


What 2 numbers have a LCM of 18 and gcf of 3 and lower to the number 10?

9 and 6 have an LCM of 18 and a GCF of 3.


What is the gcf and LCM of 21 and 63?

21 and 63, respectively.