LCM of 24 and 40
LCM of 24 and 40 is the smallest number among all common multiples of 24 and 40. The first few multiples of 24 and 40 are (24, 48, 72, 96, 120, 144, 168, . . . ) and (40, 80, 120, 160, . . . ) respectively. There are 3 commonly used methods to find LCM of 24 and 40  by division method, by prime factorization, and by listing multiples.
1.  LCM of 24 and 40 
2.  List of Methods 
3.  Solved Examples 
4.  FAQs 
What is the LCM of 24 and 40?
Answer: LCM of 24 and 40 is 120.
Explanation:
The LCM of two nonzero integers, x(24) and y(40), is the smallest positive integer m(120) that is divisible by both x(24) and y(40) without any remainder.
Methods to Find LCM of 24 and 40
The methods to find the LCM of 24 and 40 are explained below.
 By Listing Multiples
 By Division Method
 By Prime Factorization Method
LCM of 24 and 40 by Listing Multiples
To calculate the LCM of 24 and 40 by listing out the common multiples, we can follow the given below steps:
 Step 1: List a few multiples of 24 (24, 48, 72, 96, 120, 144, 168, . . . ) and 40 (40, 80, 120, 160, . . . . )
 Step 2: The common multiples from the multiples of 24 and 40 are 120, 240, . . .
 Step 3: The smallest common multiple of 24 and 40 is 120.
∴ The least common multiple of 24 and 40 = 120.
LCM of 24 and 40 by Division Method
To calculate the LCM of 24 and 40 by the division method, we will divide the numbers(24, 40) by their prime factors (preferably common). The product of these divisors gives the LCM of 24 and 40.
 Step 1: Find the smallest prime number that is a factor of at least one of the numbers, 24 and 40. Write this prime number(2) on the left of the given numbers(24 and 40), separated as per the ladder arrangement.
 Step 2: If any of the given numbers (24, 40) is a multiple of 2, divide it by 2 and write the quotient below it. Bring down any number that is not divisible by the prime number.
 Step 3: Continue the steps until only 1s are left in the last row.
The LCM of 24 and 40 is the product of all prime numbers on the left, i.e. LCM(24, 40) by division method = 2 × 2 × 2 × 3 × 5 = 120.
LCM of 24 and 40 by Prime Factorization
Prime factorization of 24 and 40 is (2 × 2 × 2 × 3) = 2^{3} × 3^{1} and (2 × 2 × 2 × 5) = 2^{3} × 5^{1} respectively. LCM of 24 and 40 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 2^{3} × 3^{1} × 5^{1} = 120.
Hence, the LCM of 24 and 40 by prime factorization is 120.
☛ Also Check:
 LCM of 50 and 70  350
 LCM of 16 and 64  64
 LCM of 6 and 18  18
 LCM of 3, 4 and 12  12
 LCM of 207 and 138  414
 LCM of 6 and 12  12
 LCM of 24 and 42  168
LCM of 24 and 40 Examples

Example 1: Verify the relationship between GCF and LCM of 24 and 40.
Solution:
The relation between GCF and LCM of 24 and 40 is given as,
LCM(24, 40) × GCF(24, 40) = Product of 24, 40
Prime factorization of 24 and 40 is given as, 24 = (2 × 2 × 2 × 3) = 2^{3} × 3^{1} and 40 = (2 × 2 × 2 × 5) = 2^{3} × 5^{1}
LCM(24, 40) = 120
GCF(24, 40) = 8
LHS = LCM(24, 40) × GCF(24, 40) = 120 × 8 = 960
RHS = Product of 24, 40 = 24 × 40 = 960
⇒ LHS = RHS = 960
Hence, verified. 
Example 2: Find the smallest number that is divisible by 24 and 40 exactly.
Solution:
The smallest number that is divisible by 24 and 40 exactly is their LCM.
⇒ Multiples of 24 and 40: Multiples of 24 = 24, 48, 72, 96, 120, . . . .
 Multiples of 40 = 40, 80, 120, 160, 200, . . . .
Therefore, the LCM of 24 and 40 is 120.

Example 3: The GCD and LCM of two numbers are 8 and 120 respectively. If one number is 40, find the other number.
Solution:
Let the other number be y.
∵ GCD × LCM = 40 × y
⇒ y = (GCD × LCM)/40
⇒ y = (8 × 120)/40
⇒ y = 24
Therefore, the other number is 24.
FAQs on LCM of 24 and 40
What is the LCM of 24 and 40?
The LCM of 24 and 40 is 120. To find the LCM (least common multiple) of 24 and 40, we need to find the multiples of 24 and 40 (multiples of 24 = 24, 48, 72, 96 . . . . 120; multiples of 40 = 40, 80, 120, 160) and choose the smallest multiple that is exactly divisible by 24 and 40, i.e., 120.
What is the Relation Between GCF and LCM of 24, 40?
The following equation can be used to express the relation between GCF and LCM of 24 and 40, i.e. GCF × LCM = 24 × 40.
If the LCM of 40 and 24 is 120, Find its GCF.
LCM(40, 24) × GCF(40, 24) = 40 × 24
Since the LCM of 40 and 24 = 120
⇒ 120 × GCF(40, 24) = 960
Therefore, the GCF = 960/120 = 8.
What are the Methods to Find LCM of 24 and 40?
The commonly used methods to find the LCM of 24 and 40 are:
 Prime Factorization Method
 Listing Multiples
 Division Method
How to Find the LCM of 24 and 40 by Prime Factorization?
To find the LCM of 24 and 40 using prime factorization, we will find the prime factors, (24 = 2 × 2 × 2 × 3) and (40 = 2 × 2 × 2 × 5). LCM of 24 and 40 is the product of prime factors raised to their respective highest exponent among the numbers 24 and 40.
⇒ LCM of 24, 40 = 2^{3} × 3^{1} × 5^{1} = 120.