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4–5EXAMPLE Find the LCMREVIEW ITWhy is the number 1neither prime norcomposite? (Lesson 1-2)Find the LCM of 8 and 18.Write the prime factorizations of each number. Identify allcommon prime factors.8 = 2 × 2 × 218 = 2 × 3 × 3Find the product of the prime factors using each common primefactor only once and any remaining factors. The LCM is× × × × or 72.Check Your Progress Find the LCM of 9 and 21.EXAMPLEHOMEWORKASSIGNMENTPage(s):Exercises:MONEY Liam, Eva, and Brady each have the sameamount of money. Liam has only nickels, Eva has onlydimes, and Brady has only quarters. What is the leastamount of money that each of them could have?Find the LCM using prime factors.5×10×The least amount of money that each of them could have is× × or .Check Your Progress CANDY Michael, Logan, and Diegoeach have bags of candy that have the same total weight.Michael’s bag has candy bars that each weigh 4 ounces, Logan’sbag has candy bars that each weigh 6 ounces, and Diego’s baghas candy bars that each weigh 9 ounces. What is the leasttotal weight that each of them could have?25×Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.98 Math Connects, Course 1