WebTo find the GCF of two numbers list the factors of each number. Then mark the common factors in both lists. The greatest marked factor is the GCF. What GCF is used for? … WebLet us consider the example given below: For example – The GCF of 18, 21 is 3. Because the factors of the number 18 and 21 are: Factors of 18 = 2×9 =2×3×3. Factors of 21 = …
Calculate the GCF (greatest common factor) of (7,21,70) …
WebStep-4: Factors of 21. List of positive integer factors of 21 that divides 15 without a remainder. 1, 3, 7. Final Step: Biggest Common Factor Number. We found the factors and prime factorization of 15 and 21. The biggest common factor number is the GCF number. So the greatest common factor 15 and 21 is 3. Also check out the Least Common ... WebThis is the greatest common factor. In this case, the greatest common factor is 3x. Proceed by placing 3x before a set of parentheses. The terms within the parentheses are found by dividing each term of the original expression by 3x. ... The factors of 15 are 1, 3, 5, 15. Eliminate as too large the product of 15 with 2x, 3x, or 6x. Try some ... the people system m\u0026s
What is the GCF of 15 and 21 - Calculatio
WebStep 1 - Represent the numbers in the prime factored form. Step 2 - GCF is the product of the factors that are common to each of the given numbers. Thus, GCF (60,90) = 2 1 × 3 1 × 5 1 = 30. Therefore, GCF of 60 and 90 = 30. We can also find the greatest common factor of three numbers or more by this method. WebThe second method to find GCF for numbers 15 and 21 is to list all Prime Factors for both numbers and multiply the common ones: All Prime Factors of 15: 3, 5. All Prime Factors of 21: 3, 7. As we can see there is only one Prime Factor common to both numbers. It is 3. So 3 is the Greatest Common Factor of 15 and 21. WebAnswer: Greatest Common Factor of 7 and 21 = 7. Step 1: Find the prime factorization of 7. 7 = 7. Step 2: Find the prime factorization of 21. 21 = 3 x 7. Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf: GCF = 7. the people that died