Now, consider the numbers 12, 15, and 75. Come up with a "real life" scenario where the LCM of 12, 15, and 75 needs to be found. By a "real life scenario", we mean a plausible situation where the LCM should be found to solve some real world problem. We do not just mean a problem of the type "Find the LCM of 12, 15, and 75." There needs to be relatable context in a word problem that leads to the solution. Then, use the prime factorization methods of the chapter to find the LCM(12,15,75) and relate the answer back to your word problem. Do so in a way that an elementary aged student could understand your explanation.