What is the GCF of 4 and 5?
Greatest Common Factor (GCF): A number that is the largest and also is perfectly or exactly dividing the given set of numbers.
Answer: GCF of 4 and 5: 1
Let us see a few ways to find the GCF of 4 and 5.
GCF(4,5) can be found in many ways, let us see how to find using two methods.
- Listing the Factors
- Long Division
Listing the Factors to Find GCF(4,5):
- List the factors of the given numbers.
- Spot the common factors.
- Mark the largest amongst the common factors as the GCF
Factors of 4: 1, 2, 4
Factors of 5: 1, 5
Greatest Common Factor of 4 and 5 is 1.
GCF(4 and 5): 1
Long Division Method:
- Take the larger number as the dividend and the smaller number as the divisor.
- In the next step, the divisor acts as the dividend and the remainder as the divisor.
- This continues until a 0 is obtained as the remainder.
- The last divisor is taken as the GCF
Note that 4 and 5 are consecutive numbers. GCF of consecutive numbers will always be 1.