Least Common Multiple of 7 and 24

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

• Least Common Multiple of 7 and 24 by Prime method
• Least Common Multiple of 7 and 24 with GCF Formula

Least common multiple can be found by multiplying the highest exponent prime factors of 7 and 24. First we will calculate the prime factors of 7 and 24.

Prime Factorization of 7

Prime factors of 7 are 7. Prime factorization of 7 in exponential form is:

7 = 7¹

Prime Factorization of 24

Prime factors of 24 are 2,3. Prime factorization of 24 in exponential form is:

24 = 2³×3¹

Now multiplying the highest exponent prime factors to calculate the LCM of 7 and 24.

LCM(7,24) = 2³×3¹×7¹
LCM(7,24) = 168

Factors of 7

List of positive integer factors of 7 that divides 7 without a remainder.

1, 7

Factors of 24

List of positive integer factors of 24 that divides 24 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7 and 24, than apply into the LCM equation.

GCF(7,24) = 1
LCM(7,24) = ( 7 × 24) / 1
LCM(7,24) = 168 / 1
LCM(7,24) = 168

(i) The LCM of 24 and 7 is associative

LCM of 7 and 24 = LCM of 24 and 7

1. What is the LCM of 7 and 24?

Answer: LCM of 7 and 24 is 168.

2. What are the Factors of 7?

Answer: Factors of 7 are 1, 7. There are 2 integers that are factors of 7. The greatest factor of 7 is 7.

3. What are the Factors of 24?

Answer: Factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24. There are 8 integers that are factors of 24. The greatest factor of 24 is 24.

4. How to Find the LCM of 7 and 24?

Answer:

Least Common Multiple of 7 and 24 = 168

Step 1: Find the prime factorization of 7

7 = 7

Step 2: Find the prime factorization of 24

24 = 2 x 2 x 2 x 3

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

LCM = 168 = 2 x 2 x 2 x 3 x 7

Step 4: Therefore, the least common multiple of 7 and 24 is 168.