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Question
Find Greatest Common Divisor of 1080, 1260 and 3150, using prime factorization.
Answer
The GCD of given numbers is 90.
Explanation
Step 1 : Find prime factorization of each number.
1080=1260=3150=2⋅2⋅2⋅3⋅3⋅3⋅52⋅2⋅3⋅3⋅5⋅72⋅3⋅3⋅5⋅5⋅7(view steps on how to factor 1080, 1260 and 3150. )
Step 2 : Put a box around factors that are common for all numbers:
1080=1260=3150=2⋅2⋅2⋅3⋅3⋅3⋅52⋅2⋅3⋅3⋅5⋅72⋅3⋅3⋅5⋅5⋅7Step 3 : Multiply the boxed numbers together:
GCD=2⋅3⋅3⋅5=90
This solution can be visualized using a Venn diagram.
0,0
1080
1260
3150
2
3
3
5
2
7
2
3
5
The GCD equals the product of the numbers at the intersection.
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GCD Calculator