LCM of 39 and 247
741 is the LCM of 39 and 247. The step-by-step solution using prime factors and special division methods is one of the simple methods to easily understand how to find what is the LCM of 39 and 247, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 39 and 247?
lcm (39 247) = (?)
39 => 3 x 13
247 => 13 x 19
= 13 x 3 x 19
= 741
lcm (39 and 247) = 741
741 is the LCM of 39 and 247.
where,
39 is a positive integer,
247 is a positive integer,
741 is the LCM of 39 and 247,
{13} in {3 x 13, 13 x 19} is the common factors of 39 and 247,
{3 x 19} in {3 x 13, 13 x 19} are the uncommon factors of 39 and 247.
Use in Mathematics: LCM of 39 and 247
The below are some of the mathematical applications where lcm of 39 and 247 can be used:
- to find the least number which is exactly divisible by 39 and 247.
- to find the common denominator for two fractions having 39 and 247 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 39 and 247 helps to find the exact time when two similar and recurring events with different time schedule happens together at the same time. For example, the real world problems involve lcm in situations to find at what time the bells A and B all toll together, if bell A tolls at 39 seconds and bell B tolls at 247 seconds repeatedly. The answer is that all bells A and B toll together at 741 seconds for the first time, at 1482 seconds for the second time, at 2223 seconds for the third time and so on.
Important Notes: 39 and 247 lcm
The below are the important notes to be remembered while solving the lcm of 39 and 247:
- The common prime factors and the remaining prime factors of 39 and 247 should be multiplied to find the least common multiple of 39 and 247, when solving lcm by using prime factors method.
- The results of lcm of 39 and 247, and the lcm of 247 and 39 are identical, it means the order of given numbers in the lcm calculation doesn't affect the results.
How-to: What is the LCM of 39 and 247?
The below solved example with step by step work shows how to find what is the lcm of 39 and 247 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 39 and 247?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 39
B = 247
What to be found:
find the lcm of 39 and 247
step 2 Find the prime factors of 39 and 247:
Prime factors of 39 = 3 x 13
Prime factors of 247 = 13 x 19
step 3 Identify the repeated and non-repeated prime factors of 39 and 247:
{13} is the most repeated factor and {3 x 19} are the non-repeated factors of 39 and 247.
step 4 Find the product of repeated and non-repeated prime factors of 39 and 247:
= 13 x 3 x 19
= 741
lcm(39 and 247) = 741
Hence,
lcm of 39 and 247 is 741
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 39 and 247.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 39 and 247
What to be found:
lcm (39, 247) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
39 and 247
step 3 Choose the divisor which divides each or most of the given integers (39 and 247), divide each integers separately and write down the quotient in the next line right under the respective integers. Bring down the integer to the next line if any integer in 39 and 247 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 39 | 247 |
| 13 | 13 | 247 |
| 19 | 1 | 19 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 39 and 247:
= 3 x 13 x 19
= 741
LCM(39, 247) = 741
The LCM of two numbers 39 and 247 is 741