The traffic signals at three different road crossings change after every 30, 45, 50 and 100 seconds respectively. If they all change simultaneously at 11:50 am, then at what time will they again change simultaneously?

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HCF stands for Highest Common Factor and LCM stands for Lowest Common Multiple. The HCF is the largest integer that can be divided by two or more numbers. The LCM is the smallest integer that is a multiple of two or more composite numbers. You can calculate the HCF and LCM of two or more numbers by writing out a list of factors or multiples. However, this can be time consuming and complicated when dealing with large numbers. You can also use prime factors to calculate the HCF and LCM. The HCF of a set of numbers is the product of the prime factors that are common to all of the numbers. For... Show more

The traffic signals at three different road crossings change after every 30, 45, 50 and 100 seconds respectively. If they all change simultaneously at 11:50 am, then at what time will they again change simultaneously?