45 and 135 LCM
LCM of 45 and 135 is equal to 135. The comprehensive work provides more insight of how to find what is the lcm of 45 and 135 by using prime factors and special division methods, and the example use case of mathematics and real world problems.
what is the lcm of 45 and 135?
lcm (45 135) = (?)
45 => 3 x 3 x 5
135 => 3 x 3 x 3 x 5
= 3 x 3 x 5 x 3
= 135
lcm (45 and 135) = 135
135 is the lcm of 45 and 135.
where,
45 is a positive integer,
135 is a positive integer,
135 is the lcm of 45 and 135,
{3 x 3 x 5} in {3 x 3 x 5, 3 x 3 x 3 x 5} are the common factors of 45 and 135,
{3} in {3 x 3 x 5, 3 x 3 x 3 x 5} is the uncommon factors of 45 and 135.
Use in Mathematics: LCM of 45 and 135
The below are some of the mathematical applications where lcm of 45 and 135 can be used:
- to find the least number which is exactly divisible by 45 and 135.
- to find the common denominator for two fractions having 45 and 135 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 45 and 135 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 45 seconds and bell B tolls at 135 seconds repeatedly. The answer is that all bells A and B toll together at 135 seconds for the first time, at 270 seconds for the second time, at 405 seconds for the third time and so on.
Important Notes: 45 and 135 lcm
The below are the important notes to be remembered while solving the lcm of 45 and 135:
- The common prime factors and the remaining prime factors of 45 and 135 should be multiplied to find the least common multiple of 45 and 135, when solving lcm by using prime factors method.
- The results of lcm of 45 and 135, and the lcm of 135 and 45 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 45 and 135?
The below solved example with step by step work shows how to find what is the lcm of 45 and 135 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 45 and 135?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 45
B = 135
What to be found:
find the lcm of 45 and 135
step 2 Find the prime factors of 45 and 135:
Prime factors of 45 = 3 x 3 x 5
Prime factors of 135 = 3 x 3 x 3 x 5
step 3 Identify the repeated and non-repeated prime factors of 45 and 135:
{3, 3, 5} are the most repeated factors and {3} is the non-repeated factor of 45 and 135.
step 4 Find the product of repeated and non-repeated prime factors of 45 and 135:
= 3 x 3 x 5 x 3
= 135
lcm(45 and 135) = 135
Hence,
lcm of 45 and 135 is 135
This special division method is the easiest way to understand the entire calculation of what is the lcm of 45 and 135.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 45 and 135
What to be found:
lcm (45, 135) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
45 and 135
step 3 Choose the divisor which divides each or most of the given integers (45 and 135), 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 45 and 135 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 45 | 135 |
| 3 | 15 | 45 |
| 3 | 5 | 15 |
| 5 | 5 | 5 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 45 and 135:
= 3 x 3 x 3 x 5
= 135
LCM(45, 135) = 135
The least common multiple for two numbers 45 and 135 is 135