Sometimes you are given numbers expressed as a product of prime factors. For example, 8 = 2 3 and 90 = 2 × 3 2 × 5. If you want to find the LCM and HCF in an exam, we can use prime factor form to ...

The LCM of two or more numbers is the smallest number that is a multiple of all the given numbers. To find the LCM: The HCF, also known as the GCD (Greatest Common Divisor), is the largest number that ...

Think about how we normally find HCFs and LCMs. Take two numbers, x and y. (I'm also not a fan of algebra, but bear with me here.) For these two numbers there must a least common multiple 'l' that is ...

SSC conducts CGL exam once every year for recruiting the Grade-‘B’ & ‘C’ officers in various government offices and ministries. Quantitative Aptitude is one subject with the other three. HCF & LCM is ...

It would take a long time to write out all the factors and multiples of 24 and 180 and compare the lists. It would also be easy to make a mistake. A more efficient method is to use prime factors.