LCM Employment Application Form

Instructions and help about LCM Employment Application

welcome to today's lesson today we are going to look at from one mathematics under the application of the least common multiple and the question reads three athletes korea jabez and karaoke start the race around a circular field they take 90 seconds 120 seconds and 150 seconds respectively to complete a round find the time they will be at the same point if they start the race at 7 15 am to find the time they will be at the same point we get the lcm of 90 120 and 150 seconds and to get the lcm we use a table we have 90. we have 120 and then we have 150 so to get the lcm here we begin with the smallest factor which is 2 so 2 goes to 90 45 times 2 goes to 120 60 times then 2 goes to 150 75 times 2 again goes to 60 it does not go to 45 it goes to 60 30 times it does not go to 75 so we bring 75 down again we take 2 2 does not divide 45 so we bring it down 2 divides 30 15 times it does not divide 75 so we bring 75 down next we go now to 3 because 2 cannot 3 divides 45 15 times it divides 15