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Question

What is LCM

2 years ago

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505 Replies

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Iftikhar


please explain it briefly

505 Answers

Luca M Profile Picture
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LCM is the shorthand for Lowest Common Multiple (or Least Common Multiple). It is the smallest number that is a multiple of 2 or more numbers.

To work it out between two or more numbers, we work out the prime factorisation of the numbers and then use them create the LCM.

For example the LCM of 8 and 20:

We work out the prime factorisation for both.

8 = 2 x 2 x 2

20 = 2 x 2 x 5

We need the LCM to include both factorisations but be the smallest number to do so, so we need the LCM to contain 3 2s, and a 5.

LCM = 2 x 2 x 2 x 5 = 40

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I
Indirakumar

Least Common Multiple(LCM) is a method to find the smallest common multiple between any two or more numbers. A common multiple is a number which is a multiple of two or more numbers.

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Zainab Masood

LCM is the the lowest common multiple of two numbers. It is the smallest positive number that is divisible by the two numbers

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Ebenezer Elisha

LCM stands for Least Common Multiple, and this is a the smallest number that is divisible by a set of other numbers. In most cases, LCM is normally a whole number. For example, the LCM of 2 and 3 is 6. This means that 6 is the smallest number that can be divided by both 2 and 3. Other examples: the LCM of 2 and 4 is 4, the LCM of 3 and 4 is 12 and the LCM of 2 and 5 is 10.

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Abdulsalam Abdulsalami

The abbreviation LCM stands for 'Least Common Multiple'. The least common multiple (LCM) of two numbers is the lowest possible number that can be divisible by both numbers. It can be calculated for two or more numbers as well. There are different methods to find the LCM of a given set of numbers. I can explain further in a lesson

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Leonid Maydannik

LCM in Mathematics stands for Lowest Common Multiple, which is the smallest number which two other numbers fit into.

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Mr Bradley Watson

Hi, LCM means Lowest/Least Common Multiple. For example: The LCM of 6 and 4 is 12, as the smallest number that is common between the two.

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David Quigley

LCM stands for lowest common multiple - the smallest value that is in each given number's multiplication tables.

For example, the LCM of 4 and 5 is 20, as that's the lowest number in both number's tables.

The LCM of 4 and 12, however, is 12 - as 12 itself is in 4's multiplication table.

Hope this helps!

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Angela Paxton

LCM is Lowest Common Multiple and is the smallest number that two or more whole numbers will divide into exactly.

Ryan Profile Picture
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LCM refers to the lowest common multiple. For example when we have 2 numbers it is referred to as the lowest number that both the numbers go into hence multiple

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A
Adheena Joseph

CM is the method to find the smallest possible multiple of two or more numbers.

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Mel Chilekwa

LCM stands for Lowest Common Multiple of a set of numbers. To find the LCM, you can use the method of prime factorisation. For example, to find the LCM of 24 and 36, first express both number as their prime factors. For 24, this is 2, 2, 2 and 3. For 36 this is 2, 2, 3 and 3. Now to find the LCM, multiply each factor by the times it occurs . In this example, 2 occurs 3 times and 3 occurs 2 times, so the LCM = 2 x 2 x 2 x 3 x 3 = 72.

Ollie Profile Picture
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The lowest common multiple (LCM) of 2 numbers, 'a' and 'b', is the smallest number that can be divided exactly by both 'a' and 'b'

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Arman Akther

LCM is an acronym for Lowest Common Multiple. Say we had 2 numbers e.g. 6 and 8, we would find the lowest number that is in both their times tables. In this case the lowest multiple is 24 as (6 x 4 = 24) and (8 x 3 = 24).

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Hassan Nazir

LCM means Least Common Factor.


Suppose you have two integers 9 and 15.

If you need to find the smallest number that is divisible by both 9 and 15 then you will need to find the LCM of 9 and 15. In this example 45 will be the smallest number that is divisible by both 9 and 15.


Let's see how we can find the LCM of 9 and 15


Multiples of 9 = 9, 18, 27, 36, 45, 54, 63, 72, 81, 90.

Multiple of 15 = 15, 30, 45, 60, 75, 90, 105, 120, 135, 150.


(Here we just wrote down the multiple of both numbers)


Now we have to find the smallest common number present in the multiple of 9 and 15. In this case 45 is the smallest number common number that is present in the multiples of both numbers. Therefore 45 is the LCM of 9 and 15.

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