What is the GCF of 18 and 25?
The largest possible number which divides the given numbers exactly without leaving any remainder is called the GCF (Greatest Common Factor).
Answer: GCF of 18 and 25 is 1
GCF of 18 and 25 is the highest number that divides 18 and 25 exactly leaving the remainder 0.
We will explain the following methods to the highest common factor of 18 and 25.
- GCF of 18 and 25 by Long Division Method
- GCF of 18 and 25 by Listing the Common Factors
Method 1: Find GCF of 18 and 25 by Long Division
The steps to find the GCF (18, 25) by long division are mentioned below.
Step 1: Divide 25 by 18 and check the remainder. Here, we get the remainder of 7.
Step 2: Make the remainder 7 as the divisor and the divisor of the above step 18 as the dividend and perform the long division again.
Step 3: Continuously follow step 2 till you get the remainder as 0.
GCF of 18 and 25 will the last divisor in the process.
So, the highest common factor of 18 and 25 is 1.
Method 2: Find GCF of 18 and 25 by Listing the Common Factors
The factors of 18 and 25 are shown below.
The common factor of 18 and 25 is 1.
The Greatest common factor of 18 and 25 is 1.
You can find the GCF in any of the above methods but the solution will be the same.