or GCF st What is in solving real-life problems involving GCF (Greatest common Factor) we follow the 4 step plan. First step is Understand; Know what the problem asked for and know the given facts. Second is Plan; Determine the operation/method to use Next is Solve; Carry Out/Show the solution to the problem. And the last step is Check and Look Back; Check if the answer is reasonable and then state the complete answer. Now, let us answer the problem using the 4-step plan. Understand: What does the problem ask The greatest number of roses that for? she can use in a bouquet What are the given facts? 24 red roses, 36 white roses Plan: How will you solve the by finding the Greatest Common problem? Factor (GCF) Solve: How is the solution done? By using Listing Method: Listing the factors of 12 and 18 24: 1, 2, 3, 4, 6, 8, 12)and 24 36: 1, 2, 3, 4, 6, 9.12) 18 and 36 The Greatest Common Factor (GCF) of 24 and 36 is 12. By using Prime Factorization 24 36 5 2 x 12 2 x 18 2 x 6 2 x9 2 x 3