Least Common Multiple of 10 and 25

Least common multiple or lowest common denominator (LCD) can be calculated in three ways;

• Least Common Multiple of 10 and 25 by Prime method
• Least Common Multiple of 10 and 25 with GCF Formula

Least common multiple can be found by multiplying the highest exponent prime factors of 10 and 25. First we will calculate the prime factors of 10 and 25.

Prime Factorization of 10

Prime factors of 10 are 2,5. Prime factorization of 10 in exponential form is:

10 = 2¹×5¹

Prime Factorization of 25

Prime factors of 25 are 5. Prime factorization of 25 in exponential form is:

25 = 5²

Now multiplying the highest exponent prime factors to calculate the LCM of 10 and 25.

LCM(10,25) = 2¹×5²
LCM(10,25) = 50

Factors of 10

List of positive integer factors of 10 that divides 10 without a remainder.

1, 2, 5, 10

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1, 5, 25

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 10 and 25, than apply into the LCM equation.

GCF(10,25) = 5
LCM(10,25) = ( 10 × 25) / 5
LCM(10,25) = 250 / 5
LCM(10,25) = 50

(i) The LCM of 25 and 10 is associative

LCM of 10 and 25 = LCM of 25 and 10

1. What is the LCM of 10 and 25?

Answer: LCM of 10 and 25 is 50.

2. What are the Factors of 10?

Answer: Factors of 10 are 1, 2, 5, 10. There are 4 integers that are factors of 10. The greatest factor of 10 is 10.

3. What are the Factors of 25?

Answer: Factors of 25 are 1, 5, 25. There are 3 integers that are factors of 25. The greatest factor of 25 is 25.

4. How to Find the LCM of 10 and 25?

Answer:

Least Common Multiple of 10 and 25 = 50

Step 1: Find the prime factorization of 10

10 = 2 x 5

Step 2: Find the prime factorization of 25

25 = 5 x 5

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 50 = 2 x 5 x 5

Step 4: Therefore, the least common multiple of 10 and 25 is 50.