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GCF of 35 and 49

GCF of 35 and 49 is the largest possible number that divides 35 and 49 exactly without any remainder. The factors of 35 and 49 are 1, 5, 7, 35 and 1, 7, 49 respectively. There are 3 commonly used methods to find the GCF of 35 and 49 - long division, prime factorization, and Euclidean algorithm.

1.	GCF of 35 and 49
2.	List of Methods
3.	Solved Examples
4.	FAQs

What is GCF of 35 and 49?

Answer: GCF of 35 and 49 is 7.

Explanation:

The GCF of two non-zero integers, x(35) and y(49), is the greatest positive integer m(7) that divides both x(35) and y(49) without any remainder.

Methods to Find GCF of 35 and 49

Let's look at the different methods for finding the GCF of 35 and 49.

Long Division Method
Prime Factorization Method
Listing Common Factors

GCF of 35 and 49 by Long Division

GCF of 35 and 49 is the divisor that we get when the remainder becomes 0 after doing long division repeatedly.

Step 1: Divide 49 (larger number) by 35 (smaller number).
Step 2: Since the remainder ≠ 0, we will divide the divisor of step 1 (35) by the remainder (14).
Step 3: Repeat this process until the remainder = 0.

The corresponding divisor (7) is the GCF of 35 and 49.

GCF of 35 and 49 by Prime Factorization

Prime factorization of 35 and 49 is (5 × 7) and (7 × 7) respectively. As visible, 35 and 49 have only one common prime factor i.e. 7. Hence, the GCF of 35 and 49 is 7.

GCF of 35 and 49 by Listing Common Factors

Factors of 35: 1, 5, 7, 35
Factors of 49: 1, 7, 49

There are 2 common factors of 35 and 49, that are 1 and 7. Therefore, the greatest common factor of 35 and 49 is 7.

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GCF of 35 and 49 Examples

Example 1: Find the greatest number that divides 35 and 49 exactly.

Solution:

The greatest number that divides 35 and 49 exactly is their greatest common factor, i.e. GCF of 35 and 49.
⇒ Factors of 35 and 49:
- Factors of 35 = 1, 5, 7, 35
- Factors of 49 = 1, 7, 49
Therefore, the GCF of 35 and 49 is 7.
Example 2: The product of two numbers is 1715. If their GCF is 7, what is their LCM?

Solution:

Given: GCF = 7 and product of numbers = 1715
∵ LCM × GCF = product of numbers
⇒ LCM = Product/GCF = 1715/7
Therefore, the LCM is 245.
Example 3: Find the GCF of 35 and 49, if their LCM is 245.

Solution:

∵ LCM × GCF = 35 × 49
⇒ GCF(35, 49) = (35 × 49)/245 = 7
Therefore, the greatest common factor of 35 and 49 is 7.

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FAQs on GCF of 35 and 49

What is the GCF of 35 and 49?

The GCF of 35 and 49 is 7. To calculate the greatest common factor (GCF) of 35 and 49, we need to factor each number (factors of 35 = 1, 5, 7, 35; factors of 49 = 1, 7, 49) and choose the greatest factor that exactly divides both 35 and 49, i.e., 7.

What are the Methods to Find GCF of 35 and 49?

There are three commonly used methods to find the GCF of 35 and 49.

By Long Division
By Prime Factorization
By Euclidean Algorithm

How to Find the GCF of 35 and 49 by Long Division Method?

To find the GCF of 35, 49 using long division method, 49 is divided by 35. The corresponding divisor (7) when remainder equals 0 is taken as GCF.

What is the Relation Between LCM and GCF of 35, 49?

The following equation can be used to express the relation between LCM and GCF of 35 and 49, i.e. GCF × LCM = 35 × 49.

If the GCF of 49 and 35 is 7, Find its LCM.

GCF(49, 35) × LCM(49, 35) = 49 × 35
Since the GCF of 49 and 35 = 7
⇒ 7 × LCM(49, 35) = 1715
Therefore, LCM = 245
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How to Find the GCF of 35 and 49 by Prime Factorization?

To find the GCF of 35 and 49, we will find the prime factorization of the given numbers, i.e. 35 = 5 × 7; 49 = 7 × 7.
⇒ Since 7 is the only common prime factor of 35 and 49. Hence, GCF (35, 49) = 7.
☛ Prime Number

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