Question
Find Greatest Common Divisor of 12, 18, 20 and 30, using prime factorization.
Answer
The GCD of given numbers is 2.
Explanation
Step 1 : Find prime factorization of each number.
(view steps on how to factor 12, 18, 20 and 30. )
Step 2 : Put a box around factors that are common for all numbers:
Step 3 : Multiply the boxed numbers together:
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