LCM of 80 and 115
1840 is the LCM of 80 and 115. 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 80 and 115, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 80 and 115?
lcm (80 115) = (?)
80 => 2 x 2 x 2 x 2 x 5
115 => 5 x 23
= 5 x 2 x 2 x 2 x 2 x 23
= 1840
lcm (80 and 115) = 1840
1840 is the LCM of 80 and 115.
where,
80 is a positive integer,
115 is a positive integer,
1840 is the LCM of 80 and 115,
{5} in {2 x 2 x 2 x 2 x 5, 5 x 23} is the common factors of 80 and 115,
{2 x 2 x 2 x 2 x 23} in {2 x 2 x 2 x 2 x 5, 5 x 23} are the uncommon factors of 80 and 115.
Use in Mathematics: LCM of 80 and 115
The below are some of the mathematical applications where lcm of 80 and 115 can be used:
- to find the least number which is exactly divisible by 80 and 115.
- to find the common denominator for two fractions having 80 and 115 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 80 and 115 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 80 seconds and bell B tolls at 115 seconds repeatedly. The answer is that all bells A and B toll together at 1840 seconds for the first time, at 3680 seconds for the second time, at 5520 seconds for the third time and so on.
Important Notes: 80 and 115 lcm
The below are the important notes to be remembered while solving the lcm of 80 and 115:
- The common prime factors and the remaining prime factors of 80 and 115 should be multiplied to find the least common multiple of 80 and 115, when solving lcm by using prime factors method.
- The results of lcm of 80 and 115, and the lcm of 115 and 80 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 80 and 115?
The below solved example with step by step work shows how to find what is the lcm of 80 and 115 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 80 and 115?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 80
B = 115
What to be found:
find the lcm of 80 and 115
step 2 Find the prime factors of 80 and 115:
Prime factors of 80 = 2 x 2 x 2 x 2 x 5
Prime factors of 115 = 5 x 23
step 3 Identify the repeated and non-repeated prime factors of 80 and 115:
{5} is the most repeated factor and {2 x 2 x 2 x 2 x 23} are the non-repeated factors of 80 and 115.
step 4 Find the product of repeated and non-repeated prime factors of 80 and 115:
= 5 x 2 x 2 x 2 x 2 x 23
= 1840
lcm(80 and 115) = 1840
Hence,
lcm of 80 and 115 is 1840
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 80 and 115.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 80 and 115
What to be found:
lcm (80, 115) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
80 and 115
step 3 Choose the divisor which divides each or most of the given integers (80 and 115), 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 80 and 115 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 80 | 115 |
| 2 | 40 | 115 |
| 2 | 20 | 115 |
| 2 | 10 | 115 |
| 5 | 5 | 115 |
| 23 | 1 | 23 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 80 and 115:
= 2 x 2 x 2 x 2 x 5 x 23
= 1840
LCM(80, 115) = 1840
The LCM of two numbers 80 and 115 is 1840