LCM of 13 and 91

LCM of 13 and 91 is the smallest number among all common multiples of 13 and 91. The first few multiples of 13 and 91 are (13, 26, 39, 52, 65, 78, 91, . . . ) and (91, 182, 273, 364, 455, . . . ) respectively. There are 3 commonly used methods to find LCM of 13 and 91 - by prime factorization, by listing multiples, and by division method.

Answer: LCM of 13 and 91 is 91.

Explanation:

The LCM of two non-zero integers, x(13) and y(91), is the smallest positive integer m(91) that is divisible by both x(13) and y(91) without any remainder.

Let's look at the different methods for finding the LCM of 13 and 91.

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

LCM of 13 and 91 by Division Method

To calculate the LCM of 13 and 91 by the division method, we will divide the numbers(13, 91) by their prime factors (preferably common). The product of these divisors gives the LCM of 13 and 91.

• Step 1: Find the smallest prime number that is a factor of at least one of the numbers, 13 and 91. Write this prime number(7) on the left of the given numbers(13 and 91), separated as per the ladder arrangement.
• Step 2: If any of the given numbers (13, 91) is a multiple of 7, divide it by 7 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 13 and 91 is the product of all prime numbers on the left, i.e. LCM(13, 91) by division method = 7 × 13 = 91.

LCM of 13 and 91 by Listing Multiples

To calculate the LCM of 13 and 91 by listing out the common multiples, we can follow the given below steps:

• Step 1: List a few multiples of 13 (13, 26, 39, 52, 65, 78, 91, . . . ) and 91 (91, 182, 273, 364, 455, . . . . )
• Step 2: The common multiples from the multiples of 13 and 91 are 91, 182, . . .
• Step 3: The smallest common multiple of 13 and 91 is 91.

∴ The least common multiple of 13 and 91 = 91.

LCM of 13 and 91 by Prime Factorization

Prime factorization of 13 and 91 is (13) = 13¹ and (7 × 13) = 7¹ × 13¹ respectively. LCM of 13 and 91 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 7¹ × 13¹ = 91.
Hence, the LCM of 13 and 91 by prime factorization is 91.

☛ Also Check:

• LCM of 7, 11, 21 and 22 - 462
• LCM of 6, 12, 18 and 24 - 72
• LCM of 5, 6, 7 and 8 - 840
• LCM of 5, 10, 15 and 30 - 30
• LCM of 5, 10, 15 and 20 - 60
• LCM of 4, 8, 12 and 24 - 24
• LCM of 4, 12, 16 and 24 - 48

FAQs on LCM of 13 and 91

What is the LCM of 13 and 91?

The LCM of 13 and 91 is 91. To find the LCM of 13 and 91, we need to find the multiples of 13 and 91 (multiples of 13 = 13, 26, 39, 52 . . . . 91; multiples of 91 = 91, 182, 273, 364) and choose the smallest multiple that is exactly divisible by 13 and 91, i.e., 91.

Which of the following is the LCM of 13 and 91? 91, 18, 24, 2

The value of LCM of 13, 91 is the smallest common multiple of 13 and 91. The number satisfying the given condition is 91.

If the LCM of 91 and 13 is 91, Find its GCF.

LCM(91, 13) × GCF(91, 13) = 91 × 13
Since the LCM of 91 and 13 = 91
⇒ 91 × GCF(91, 13) = 1183
Therefore, the greatest common factor (GCF) = 1183/91 = 13.

How to Find the LCM of 13 and 91 by Prime Factorization?

To find the LCM of 13 and 91 using prime factorization, we will find the prime factors, (13 = 13) and (91 = 7 × 13). LCM of 13 and 91 is the product of prime factors raised to their respective highest exponent among the numbers 13 and 91.
⇒ LCM of 13, 91 = 7¹ × 13¹ = 91.

What is the Least Perfect Square Divisible by 13 and 91?

The least number divisible by 13 and 91 = LCM(13, 91)
LCM of 13 and 91 = 7 × 13 [Incomplete pair(s): 7, 13]
⇒ Least perfect square divisible by each 13 and 91 = LCM(13, 91) × 7 × 13 = 8281 [Square root of 8281 = √8281 = ±91]
Therefore, 8281 is the required number.