LCM of 3 and 8
LCM of 3 and 8 is the smallest number among all common multiples of 3 and 8. The first few multiples of 3 and 8 are (3, 6, 9, 12, 15, 18, . . . ) and (8, 16, 24, 32, 40, 48, 56, . . . ) respectively. There are 3 commonly used methods to find LCM of 3 and 8  by prime factorization, by listing multiples, and by division method.
1.  LCM of 3 and 8 
2.  List of Methods 
3.  Solved Examples 
4.  FAQs 
What is the LCM of 3 and 8?
Answer: LCM of 3 and 8 is 24.
Explanation:
The LCM of two nonzero integers, x(3) and y(8), is the smallest positive integer m(24) that is divisible by both x(3) and y(8) without any remainder.
Methods to Find LCM of 3 and 8
Let's look at the different methods for finding the LCM of 3 and 8.
 By Division Method
 By Prime Factorization Method
 By Listing Multiples
LCM of 3 and 8 by Division Method
To calculate the LCM of 3 and 8 by the division method, we will divide the numbers(3, 8) by their prime factors (preferably common). The product of these divisors gives the LCM of 3 and 8.
 Step 1: Find the smallest prime number that is a factor of at least one of the numbers, 3 and 8. Write this prime number(2) on the left of the given numbers(3 and 8), separated as per the ladder arrangement.
 Step 2: If any of the given numbers (3, 8) 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 3 and 8 is the product of all prime numbers on the left, i.e. LCM(3, 8) by division method = 2 × 2 × 2 × 3 = 24.
LCM of 3 and 8 by Prime Factorization
Prime factorization of 3 and 8 is (3) = 3^{1} and (2 × 2 × 2) = 2^{3} respectively. LCM of 3 and 8 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 2^{3} × 3^{1} = 24.
Hence, the LCM of 3 and 8 by prime factorization is 24.
LCM of 3 and 8 by Listing Multiples
To calculate the LCM of 3 and 8 by listing out the common multiples, we can follow the given below steps:
 Step 1: List a few multiples of 3 (3, 6, 9, 12, 15, 18, . . . ) and 8 (8, 16, 24, 32, 40, 48, 56, . . . . )
 Step 2: The common multiples from the multiples of 3 and 8 are 24, 48, . . .
 Step 3: The smallest common multiple of 3 and 8 is 24.
∴ The least common multiple of 3 and 8 = 24.
☛ Also Check:
 LCM of 42 and 63  126
 LCM of 28 and 30  420
 LCM of 6, 8 and 12  24
 LCM of 6 and 7  42
 LCM of 27 and 81  81
 LCM of 35, 12 and 70  420
 LCM of 48 and 56  336
LCM of 3 and 8 Examples

Example 1: Verify the relationship between GCF and LCM of 3 and 8.
Solution:
The relation between GCF and LCM of 3 and 8 is given as,
LCM(3, 8) × GCF(3, 8) = Product of 3, 8
Prime factorization of 3 and 8 is given as, 3 = (3) = 3^{1} and 8 = (2 × 2 × 2) = 2^{3}
LCM(3, 8) = 24
GCF(3, 8) = 1
LHS = LCM(3, 8) × GCF(3, 8) = 24 × 1 = 24
RHS = Product of 3, 8 = 3 × 8 = 24
⇒ LHS = RHS = 24
Hence, verified. 
Example 2: Find the smallest number that is divisible by 3 and 8 exactly.
Solution:
The smallest number that is divisible by 3 and 8 exactly is their LCM.
⇒ Multiples of 3 and 8: Multiples of 3 = 3, 6, 9, 12, 15, 18, 21, 24, . . . .
 Multiples of 8 = 8, 16, 24, 32, 40, 48, . . . .
Therefore, the LCM of 3 and 8 is 24.

Example 3: The product of two numbers is 24. If their GCD is 1, what is their LCM?
Solution:
Given: GCD = 1
product of numbers = 24
∵ LCM × GCD = product of numbers
⇒ LCM = Product/GCD = 24/1
Therefore, the LCM is 24.
The probable combination for the given case is LCM(3, 8) = 24.
FAQs on LCM of 3 and 8
What is the LCM of 3 and 8?
The LCM of 3 and 8 is 24. To find the least common multiple (LCM) of 3 and 8, we need to find the multiples of 3 and 8 (multiples of 3 = 3, 6, 9, 12 . . . . 24; multiples of 8 = 8, 16, 24, 32) and choose the smallest multiple that is exactly divisible by 3 and 8, i.e., 24.
If the LCM of 8 and 3 is 24, Find its GCF.
LCM(8, 3) × GCF(8, 3) = 8 × 3
Since the LCM of 8 and 3 = 24
⇒ 24 × GCF(8, 3) = 24
Therefore, the GCF (greatest common factor) = 24/24 = 1.
What is the Least Perfect Square Divisible by 3 and 8?
The least number divisible by 3 and 8 = LCM(3, 8)
LCM of 3 and 8 = 2 × 2 × 2 × 3 [Incomplete pair(s): 2, 3]
⇒ Least perfect square divisible by each 3 and 8 = LCM(3, 8) × 2 × 3 = 144 [Square root of 144 = √144 = ±12]
Therefore, 144 is the required number.
What is the Relation Between GCF and LCM of 3, 8?
The following equation can be used to express the relation between GCF and LCM of 3 and 8, i.e. GCF × LCM = 3 × 8.
What are the Methods to Find LCM of 3 and 8?
The commonly used methods to find the LCM of 3 and 8 are:
 Listing Multiples
 Division Method
 Prime Factorization Method
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