GCF of 4 and 7
GCF of 4 and 7 is the largest possible number that divides 4 and 7 exactly without any remainder. The factors of 4 and 7 are 1, 2, 4 and 1, 7 respectively. There are 3 commonly used methods to find the GCF of 4 and 7  prime factorization, Euclidean algorithm, and long division.
1.  GCF of 4 and 7 
2.  List of Methods 
3.  Solved Examples 
4.  FAQs 
What is GCF of 4 and 7?
Answer: GCF of 4 and 7 is 1.
Explanation:
The GCF of two nonzero integers, x(4) and y(7), is the greatest positive integer m(1) that divides both x(4) and y(7) without any remainder.
Methods to Find GCF of 4 and 7
Let's look at the different methods for finding the GCF of 4 and 7.
 Prime Factorization Method
 Long Division Method
 Listing Common Factors
GCF of 4 and 7 by Prime Factorization
Prime factorization of 4 and 7 is (2 × 2) and (7) respectively. As visible, there are no common prime factors between 4 and 7, i.e. they are coprime. Hence, the GCF of 4 and 7 will be 1.
GCF of 4 and 7 by Long Division
GCF of 4 and 7 is the divisor that we get when the remainder becomes 0 after doing long division repeatedly.
 Step 1: Divide 7 (larger number) by 4 (smaller number).
 Step 2: Since the remainder ≠ 0, we will divide the divisor of step 1 (4) by the remainder (3).
 Step 3: Repeat this process until the remainder = 0.
The corresponding divisor (1) is the GCF of 4 and 7.
GCF of 4 and 7 by Listing Common Factors
 Factors of 4: 1, 2, 4
 Factors of 7: 1, 7
Since, 1 is the only common factor between 4 and 7. The Greatest Common Factor of 4 and 7 is 1.
☛ Also Check:
 GCF of 40 and 72 = 8
 GCF of 49 and 98 = 49
 GCF of 86 and 42 = 2
 GCF of 10 and 20 = 10
 GCF of 25 and 35 = 5
 GCF of 8 and 36 = 4
 GCF of 35 and 63 = 7
GCF of 4 and 7 Examples

Example 1: For two numbers, GCF = 1 and LCM = 28. If one number is 7, find the other number.
Solution:
Given: GCF (y, 7) = 1 and LCM (y, 7) = 28
∵ GCF × LCM = 7 × (y)
⇒ y = (GCF × LCM)/7
⇒ y = (1 × 28)/7
⇒ y = 4
Therefore, the other number is 4. 
Example 2: Find the GCF of 4 and 7, if their LCM is 28.
Solution:
∵ LCM × GCF = 4 × 7
⇒ GCF(4, 7) = (4 × 7)/28 = 1
Therefore, the greatest common factor of 4 and 7 is 1. 
Example 3: Find the greatest number that divides 4 and 7 exactly.
Solution:
The greatest number that divides 4 and 7 exactly is their greatest common factor, i.e. GCF of 4 and 7.
⇒ Factors of 4 and 7: Factors of 4 = 1, 2, 4
 Factors of 7 = 1, 7
Therefore, the GCF of 4 and 7 is 1.
FAQs on GCF of 4 and 7
What is the GCF of 4 and 7?
The GCF of 4 and 7 is 1. To calculate the GCF of 4 and 7, we need to factor each number (factors of 4 = 1, 2, 4; factors of 7 = 1, 7) and choose the greatest factor that exactly divides both 4 and 7, i.e., 1.
What are the Methods to Find GCF of 4 and 7?
There are three commonly used methods to find the GCF of 4 and 7.
 By Euclidean Algorithm
 By Long Division
 By Prime Factorization
What is the Relation Between LCM and GCF of 4, 7?
The following equation can be used to express the relation between Least Common Multiple (LCM) and GCF of 4 and 7, i.e. GCF × LCM = 4 × 7.
How to Find the GCF of 4 and 7 by Long Division Method?
To find the GCF of 4, 7 using long division method, 7 is divided by 4. The corresponding divisor (1) when remainder equals 0 is taken as GCF.
If the GCF of 7 and 4 is 1, Find its LCM.
GCF(7, 4) × LCM(7, 4) = 7 × 4
Since the GCF of 7 and 4 = 1
⇒ 1 × LCM(7, 4) = 28
Therefore, LCM = 28
☛ GCF Calculator
How to Find the GCF of 4 and 7 by Prime Factorization?
To find the GCF of 4 and 7, we will find the prime factorization of the given numbers, i.e. 4 = 2 × 2; 7 = 7.
⇒ There is no common prime factor for 4 and 7. Hence, GCF (4, 7) = 1.
☛ What is a Prime Number?
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