The Highest Common Factor (HCF) is the largest number that divides two or more numbers exactly without leaving a remainder. It is also known as the Greatest Common Divisor (GCD).

Let's take an example to understand this concept.

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Find the HCF of 24 and 36.

First, we list all the factors of 24 and 36: 24: 1, 2, 3, 4, 6, 8, 12, 24 36: 1, 2, 3, 4, 6, 9, 12, 18, 36

The common factors are 1, 2, 3, 4, 6, and 12. Therefore, the HCF of 24 and 36 is 12.

Now, let's move on to the Lowest Common Multiple (LCM) concept. The Lowest Common Multiple (LCM) is the smallest number, a multiple of two or more numbers.

Let's take an example to understand this concept.

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Find the LCM of 12 and 15.

First, we list the multiples of 12 and 15: 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120... 15: 15, 30, 45, 60, 75, 90, 105, 120...

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