Last updated on August 5th, 2025
The GCF is the largest number that can divide two or more numbers without leaving any remainder. GCF is used to share the items equally, to group or arrange items, and schedule events. In this topic, we will learn about the GCF of 10 and 30.
The greatest common factor of 10 and 30 is 10. The largest divisor of two or more numbers is called the GCF of the number. If two numbers are co-prime, they have no common factors other than 1, so their GCF is 1. The GCF of two numbers cannot be negative because divisors are always positive.
To find the GCF of 10 and 30, a few methods are described below -
Steps to find the GCF of 10 and 30 using the listing of factors
Step 1: Firstly, list the factors of each number
Factors of 10 = 1, 2, 5, 10.
Factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30.
Step 2: Now, identify the common factors of them Common factors of 10 and 30: 1, 2, 5, 10.
Step 3: Choose the largest factor
The largest factor that both numbers have is 10.
The GCF of 10 and 30 is 10.
To find the GCF of 10 and 30 using the Prime Factorization Method, follow these steps:
Step 1: Find the prime factors of each number
Prime Factors of 10: 10 = 2 × 5
Prime Factors of 30: 30 = 2 × 3 × 5
Step 2: Now, identify the common prime factors
The common prime factors are: 2 × 5
Step 3: Multiply the common prime factors 2 × 5 = 10.
The Greatest Common Factor of 10 and 30 is 10.
Find the GCF of 10 and 30 using the division method or Euclidean Algorithm Method. Follow these steps:
Step 1: First, divide the larger number by the smaller number
Here, divide 30 by 10 30 ÷ 10 = 3 (quotient),
The remainder is calculated as 30 − (10×3) = 0
The remainder is zero, so the divisor will become the GCF.
The GCF of 10 and 30 is 10.
Finding GCF of 10 and 30 looks simple, but students often make mistakes while calculating the GCF. Here are some common mistakes to be avoided by the students.
A chef has 10 tomatoes and 30 potatoes. He wants to group them into equal sets, with the largest number of items in each group. How many items will be in each group?
We should find GCF of 10 and 30 GCF of 10 and 30 is 10.
There are 10 equal groups 10 ÷ 10 = 1
30 ÷ 10 = 3
There will be 10 groups, and each group gets 1 tomato and 3 potatoes.
As the GCF of 10 and 30 is 10, the chef can make 10 groups. Now divide 10 and 30 by 10. Each group gets 1 tomato and 3 potatoes.
A concert venue has 10 spotlights and 30 speakers. They want to arrange them in rows with the same number of items in each row, using the largest possible number of items per row. How many items will be in each row?
GCF of 10 and 30 is 10.
So each row will have 10 items.
There are 10 spotlights and 30 speakers. To find the total number of items in each row, we should find the GCF of 10 and 30. There will be 10 items in each row.
An artist has 10 meters of canvas and 30 meters of thread. She wants to cut both materials into pieces of equal length, using the longest possible length. What should be the length of each piece?
For calculating the longest equal length, we have to calculate the GCF of 10 and 30
The GCF of 10 and 30 is 10.
The length of each piece is 10 meters.
For calculating the longest length of the materials, first, we need to calculate the GCF of 10 and 30, which is 10. The length of each piece will be 10 meters.
A landscaper has two paths, one 10 meters long and the other 30 meters long. He wants to divide them into the longest possible equal sections, without any leftover. What should be the length of each section?
The landscaper needs the longest section GCF of 10 and 30 is 10.
The longest length of each section is 10 meters.
To find the longest length of each section of the two paths, 10 meters and 30 meters, respectively, we have to find the GCF of 10 and 30, which is 10 meters. The longest length of each section is 10 meters.
If the GCF of 10 and ‘a’ is 10, and the LCM is 30. Find ‘a’.
The value of ‘a’ is 30.
GCF × LCM = product of the numbers 10 × 30 = 10 × a
300 = 10a
a = 300 ÷ 10 = 30
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.