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Question
Find Greatest Common Divisor of 9216 and 256, using prime factorization.
Answer
The GCD of given numbers is 256.
Explanation
Step 1 : Find prime factorization of each number.
9216=256=2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅3⋅32⋅2⋅2⋅2⋅2⋅2⋅2⋅2(view steps on how to factor 9216 and 256. )
Step 2 : Put a box around factors that are common for all numbers:
9216=256=2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅2⋅3⋅32⋅2⋅2⋅2⋅2⋅2⋅2⋅2Step 3 : Multiply the boxed numbers together:
GCD=2⋅2⋅2⋅2⋅2⋅2⋅2⋅2=256
This solution can be visualized using a Venn diagram.
0,0
9216
256
2
2
2
2
2
2
2
2
2
2
3
3
The GCD equals the product of the numbers at the intersection.
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