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Question
Find Greatest Common Divisor of 192, 256 and 304, using prime factorization.
Answer
The GCD of given numbers is 16.
Explanation
Step 1 : Find prime factorization of each number.
192=256=304=2⋅2⋅2⋅2⋅2⋅2⋅32⋅2⋅2⋅2⋅2⋅2⋅2⋅22⋅2⋅2⋅2⋅19(view steps on how to factor 192, 256 and 304. )
Step 2 : Put a box around factors that are common for all numbers:
192=256=304=2⋅2⋅2⋅2⋅2⋅2⋅32⋅2⋅2⋅2⋅2⋅2⋅2⋅22⋅2⋅2⋅2⋅19Step 3 : Multiply the boxed numbers together:
GCD=2⋅2⋅2⋅2=16
This solution can be visualized using a Venn diagram.
0,0
192
256
304
2
2
2
2
2
2
3
2
2
19
The GCD equals the product of the numbers at the intersection.
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