LCM of 40 and 45

LCM of 40 and 45 is 360. 360 is the smallest/least/first multiple that is common to both 40 and 45. The Least Common multiple or Lowest common multiple simply known as LCM is the smallest or the least positive integer that is divisible by the given set of numbers. There are other common multiples out of which 360 is the smallest. The LCM, also known as LCD, Least Common Divisor for 40 and 45 is 360. You can read more on LCM for further details.

What is LCM of 40 and 45

The Least Common Multiple or Lowest Common Multiple of 40 and 45 is 360.

How to Find LCM of 40 and 45?

LCM of 40 and 45 can be determined using three methods:

• Prime Factorisation
• Division method
• Listing the multiples

LCM of 40 and 45 Using Prime Factorisation Method

In the Prime Factorisation method, the numbers can be expressed as the product of prime numbers. Here, 40 and 45 can be expressed as;

40 = 2 x 2 x 2 x 5

45 = 3 x 3 x 5 

LCM (40, 45) = 2 x 2 x 2 x 3 x 3 x 5 = 360

LCM of 40 and 45 Using Division Method

In the Division Method, the given set of numbers are written in the same row separated by a comma. These numbers are divided with the smallest number that divides all, until no further division is possible or only when prime numbers are left. 

Hence, LCM (40, 45) = 2 x 2 x 2 x 3 x 3 x 5 = 360

LCM of 40 and 45 Using Listing the Multiples

By listing all the multiples of given numbers, we can identify the first/smallest/least common multiple, which is the LCM. Below is the list of multiples for 40 and 45:

LCM (40, 45) = 360

Related Articles

• LCM Calculator
• LCM with Examples
• HCF and LCM
• LCM Formula
• Prime Factorization and Division method

Video Lesson on Applications of LCM

Solved Examples 

What is the smallest number that is divisible by both 40 and 45?

Answer: 360 is the smallest number that is divisible by both 40 and 45. 

What is the LCM for 5, 40 and 45? 

Answer: LCM for 1, 40 and 45 is 360.