Lowest common multiple and highest common factor.
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Q1 · LCM and HCF · EASY
Find the HCF of 36 and 48.
Q2 · LCM and HCF · MEDIUM
The LCM of two numbers is 180 and their HCF is 15. If one number is 45, find the other number.
Q3 · LCM and HCF · MEDIUM
Three bells ring at intervals of 12 minutes, 15 minutes and 18 minutes respectively. If they all ring together at 9:00 AM, at what time will they ring together again?
Q4 · LCM and HCF · HARD
Find the greatest number that will divide 215, 167 and 263 leaving remainders 5, 7 and 11 respectively.
Q5 · LCM and HCF · MEDIUM
The LCM of two numbers is 495 and their HCF is 5. If the sum of the numbers is 100, find the difference between the two numbers.