LCM of 15 and 26
390 is the LCM of 15 and 26. 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 15 and 26, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 15 and 26?
lcm (15 26) = (?)
15 => 3 x 5
26 => 2 x 13
= 3 x 5 x 2 x 13
= 390
lcm (15 and 26) = 390
390 is the LCM of 15 and 26.
where,
15 is a positive integer,
26 is a positive integer,
390 is the LCM of 15 and 26,
There is no common factors of 15 and 26 in {3 x 5, 2 x 13},
{3 x 5 x 2 x 13} in {3 x 5, 2 x 13} are the uncommon factors of 15 and 26.
Use in Mathematics: LCM of 15 and 26
The below are some of the mathematical applications where lcm of 15 and 26 can be used:
- to find the least number which is exactly divisible by 15 and 26.
- to find the common denominator for two fractions having 15 and 26 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 15 and 26 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 15 seconds and bell B tolls at 26 seconds repeatedly. The answer is that all bells A and B toll together at 390 seconds for the first time, at 780 seconds for the second time, at 1170 seconds for the third time and so on.
Important Notes: 15 and 26 lcm
The below are the important notes to be remembered while solving the lcm of 15 and 26:
- The common prime factors and the remaining prime factors of 15 and 26 should be multiplied to find the least common multiple of 15 and 26, when solving lcm by using prime factors method.
- The results of lcm of 15 and 26, and the lcm of 26 and 15 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 15 and 26?
The below solved example with step by step work shows how to find what is the lcm of 15 and 26 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 15 and 26?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 15
B = 26
What to be found:
find the lcm of 15 and 26
step 2 Find the prime factors of 15 and 26:
Prime factors of 15 = 3 x 5
Prime factors of 26 = 2 x 13
step 3Identify the repeated and non-repeated prime factors of 15 and 26:
Since there is no common factors between 15 and 26, multiplying the given numbers directly provides the LCM of
15 and 26.
= 15 x 26
= 390
lcm(15 and 26) = 390
Hence,
lcm of 15 and 26 is 390
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 15 and 26.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 15 and 26
What to be found:
lcm (15, 26) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
15 and 26
step 3 Choose the divisor which divides each or most of the given integers (15 and 26), 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 15 and 26 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 15 | 26 |
| 3 | 15 | 13 |
| 5 | 5 | 13 |
| 13 | 1 | 13 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 15 and 26:
= 2 x 3 x 5 x 13
= 390
LCM(15, 26) = 390
The LCM of two numbers 15 and 26 is 390