39 and 165 LCM
LCM of 39 and 165 is equal to 2145. The comprehensive work provides more insight of how to find what is the lcm of 39 and 165 by using prime factors and special division methods, and the example use case of mathematics and real world problems.
what is the lcm of 39 and 165?
lcm (39 165) = (?)
39 => 3 x 13
165 => 3 x 5 x 11
= 3 x 13 x 5 x 11
= 2145
lcm (39 and 165) = 2145
2145 is the lcm of 39 and 165.
where,
39 is a positive integer,
165 is a positive integer,
2145 is the lcm of 39 and 165,
{3} in {3 x 13, 3 x 5 x 11} is the common factors of 39 and 165,
{13 x 5 x 11} in {3 x 13, 3 x 5 x 11} are the uncommon factors of 39 and 165.
Use in Mathematics: LCM of 39 and 165
The below are some of the mathematical applications where lcm of 39 and 165 can be used:
- to find the least number which is exactly divisible by 39 and 165.
- to find the common denominator for two fractions having 39 and 165 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 39 and 165 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 165 seconds repeatedly. The answer is that all bells A and B toll together at 2145 seconds for the first time, at 4290 seconds for the second time, at 6435 seconds for the third time and so on.
Important Notes: 39 and 165 lcm
The below are the important notes to be remembered while solving the lcm of 39 and 165:
- The common prime factors and the remaining prime factors of 39 and 165 should be multiplied to find the least common multiple of 39 and 165, when solving lcm by using prime factors method.
- The results of lcm of 39 and 165, and the lcm of 165 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 165?
The below solved example with step by step work shows how to find what is the lcm of 39 and 165 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 39 and 165?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 39
B = 165
What to be found:
find the lcm of 39 and 165
step 2 Find the prime factors of 39 and 165:
Prime factors of 39 = 3 x 13
Prime factors of 165 = 3 x 5 x 11
step 3 Identify the repeated and non-repeated prime factors of 39 and 165:
{3} is the most repeated factor and {13 x 5 x 11} are the non-repeated factors of 39 and 165.
step 4 Find the product of repeated and non-repeated prime factors of 39 and 165:
= 3 x 13 x 5 x 11
= 2145
lcm(39 and 165) = 2145
Hence,
lcm of 39 and 165 is 2145
This special division method is the easiest way to understand the entire calculation of what is the lcm of 39 and 165.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 39 and 165
What to be found:
lcm (39, 165) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
39 and 165
step 3 Choose the divisor which divides each or most of the given integers (39 and 165), 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 165 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 39 | 165 |
| 5 | 13 | 55 |
| 11 | 13 | 11 |
| 13 | 13 | 1 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 39 and 165:
= 3 x 5 x 11 x 13
= 2145
LCM(39, 165) = 2145
The least common multiple for two numbers 39 and 165 is 2145