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LCM
Two Numbers Three Numbers Multiple Numbers Prime Factorization Division Listing Multiples Ladder Exponents Venn Diagram Factor Tree
HCF
Two Numbers Three Numbers Multiple Numbers Prime Factorization Listing Ladder Exponents Venn Diagram Division Factor Tree All Factors By Division All Factors By Multiplication

HCF of Three Numbers By Division

Three Numbers Two Numbers Multiple Numbers
Method
Division
Prime Factorization
Venn Diagram
Listing
Ladder
Exponents
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Answer: HCF of 12, 18, 24 is 6

Step B: Find the HCF Using Division

HCF Method
Calculate HCF
2
12
18
24
3
12/
2
18/
2
24/
2
6
9
12
6/
3
9/
3
12/
3
2
3
4
HCF
=
2
x
3
=
6

Division Help

1. List all the numbers.
2. Take smallest common prime factor.
3. Place it on the left.
4. Divide each number.
5. Write quotients below.
6. Continue until no common factors.
7. Multiply factors on left for HCF.

What is Division?

The division method for finding the Highest Common Factor involves dividing the given numbers by their common factors until there are no common factors left. The HCF is then determined by multiplying these common factors.

Solved Examples

Examples

Example 1: Find the HCF of 18, 27 and 36.
Solution:
Divide the given numbers with least common prime number.
Keep dividing until common factor is present.
So, list of divisors = 3, 3
Here, we multiply all these divisors to calculate the HCF.
Therefore, HCF(18, 27, 36) = 9. Example 2: Find the HCF of 16, 24 and 32.
Solution:
Divide the given numbers with least common prime number.
Keep dividing until common factor is present.
So, list of divisors = 2, 2, 2
Here, we multiply all these divisors to calculate the HCF.
Therefore, HCF(16, 24, 32) = 8. Example 3: Find the HCF of 9, 12 and 15.
Solution:
Divide the given numbers with least common prime number.
Keep dividing until common factor is present.
So, list of divisors = 3
Here, we multiply all these divisors to calculate the HCF.
Therefore, HCF(9, 12, 15) = 3.

Exercise

1. HCF(18,27,36) = 9
 2. HCF(18, 24, 30) = 6
 3. HCF(50, 75, 100) = 25
 4. HCF(14,21,28) = 7
 5. HCF(10,20,30) = 10
 6. HCF(15,25,35) = 5
 7. HCF(6,7,21) = 1
 8. HCF(72, 96, 120) = 24
 9. HCF(88, 110, 132) = 44
 10. HCF(80,120,160) = 40

Highest Common Factor (HCF)

What is HCF?

HCF is also known as Highest Common Factor, GCF or GCD. HCF is the largest number that divides each of the given numbers without leaving a remainder.
The HCF formula can be expressed as,
HCF Formula:
HCF = (a × b)/ LCM(a,b)
where, a and b = Two terms
LCM(a, b) = Least common multiple of a and b

How to find HCF?

The Highest common factor or HCF can be found using various methods, such as: Prime Factorization MethodDivision MethodListing MethodLadder MethodExponents MethodVenn Diagram Method

FAQ

What are the steps involved to find HCF?
1. Start from the least common prime factor of numbers.
2. Divide the numbers by the least common prime factor.
3 .Repeat until the common factors found.
4. Multiply these common prime factors to calculate the HCF.
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