LCM of 25 and 100

LCM of 25 and 100 is the smallest number among all common multiples of 25 and 100. The first few multiples of 25 and 100 are (25, 50, 75, 100, 125, 150, 175, . . . ) and (100, 200, 300, 400, 500, 600, . . . ) respectively. There are 3 commonly used methods to find LCM of 25 and 100 - by prime factorization, by division method, and by listing multiples.

Answer: LCM of 25 and 100 is 100.

Explanation:

The LCM of two non-zero integers, x(25) and y(100), is the smallest positive integer m(100) that is divisible by both x(25) and y(100) without any remainder.

Let's look at the different methods for finding the LCM of 25 and 100.

• By Division Method
• By Prime Factorization Method
• By Listing Multiples

LCM of 25 and 100 by Division Method

To calculate the LCM of 25 and 100 by the division method, we will divide the numbers(25, 100) by their prime factors (preferably common). The product of these divisors gives the LCM of 25 and 100.

• Step 1: Find the smallest prime number that is a factor of at least one of the numbers, 25 and 100. Write this prime number(2) on the left of the given numbers(25 and 100), separated as per the ladder arrangement.
• Step 2: If any of the given numbers (25, 100) 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 25 and 100 is the product of all prime numbers on the left, i.e. LCM(25, 100) by division method = 2 × 2 × 5 × 5 = 100.

LCM of 25 and 100 by Prime Factorization

Prime factorization of 25 and 100 is (5 × 5) = 5² and (2 × 2 × 5 × 5) = 2² × 5² respectively. LCM of 25 and 100 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 2² × 5² = 100.
Hence, the LCM of 25 and 100 by prime factorization is 100.

LCM of 25 and 100 by Listing Multiples

To calculate the LCM of 25 and 100 by listing out the common multiples, we can follow the given below steps:

• Step 1: List a few multiples of 25 (25, 50, 75, 100, 125, 150, 175, . . . ) and 100 (100, 200, 300, 400, 500, 600, . . . . )
• Step 2: The common multiples from the multiples of 25 and 100 are 100, 200, . . .
• Step 3: The smallest common multiple of 25 and 100 is 100.

∴ The least common multiple of 25 and 100 = 100.

☛ Also Check:

• LCM of 3 and 15 - 15
• LCM of 14 and 35 - 70
• LCM of 18 and 17 - 306
• LCM of 18 and 40 - 360
• LCM of 7 and 21 - 21
• LCM of 60 and 84 - 420
• LCM of 7, 8, 11 and 12 - 1848

FAQs on LCM of 25 and 100

What is the LCM of 25 and 100?

The LCM of 25 and 100 is 100. To find the LCM of 25 and 100, we need to find the multiples of 25 and 100 (multiples of 25 = 25, 50, 75, 100; multiples of 100 = 100, 200, 300, 400) and choose the smallest multiple that is exactly divisible by 25 and 100, i.e., 100.

How to Find the LCM of 25 and 100 by Prime Factorization?

To find the LCM of 25 and 100 using prime factorization, we will find the prime factors, (25 = 5 × 5) and (100 = 2 × 2 × 5 × 5). LCM of 25 and 100 is the product of prime factors raised to their respective highest exponent among the numbers 25 and 100.
⇒ LCM of 25, 100 = 2² × 5² = 100.

What are the Methods to Find LCM of 25 and 100?

The commonly used methods to find the LCM of 25 and 100 are:

• Listing Multiples
• Prime Factorization Method
• Division Method

If the LCM of 100 and 25 is 100, Find its GCF.

LCM(100, 25) × GCF(100, 25) = 100 × 25
Since the LCM of 100 and 25 = 100
⇒ 100 × GCF(100, 25) = 2500
Therefore, the greatest common factor (GCF) = 2500/100 = 25.

What is the Relation Between GCF and LCM of 25, 100?

The following equation can be used to express the relation between GCF and LCM of 25 and 100, i.e. GCF × LCM = 25 × 100.