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Multiply these common prime factors together, each raised to its smallest power found in the factorizations. 4. Practice Exercises (Luyện tập) Problem 1: Find the common factors of 12 and 15. Step 1: Step 2: Answer: Problem 2: Find the Greatest Common Factor of 18 and 24. Factorize: Identify common prime factors: 2 and 3. Smallest powers: 212 to the first power 313 to the first power Calculation:

Since all common factors of a set of numbers are actually factors of their , it is often faster to: of the numbers. Find all factors of that . These are your common factors. 3. Step-by-Step Guide to Finding ƯCLN To find the of numbers greater than 1, follow these three steps: Luyện tбє­p ЖЇC

A number is a common factor of two or more numbers if it is a factor of all those numbers. Example: Factors of 6 are . Factors of 8 are . Their common factors are Multiply these common prime factors together, each raised

Decompose each number into its prime factors. Step 1: Step 2: Answer: Problem 2: Find