LCM of 28 and 136
952 is the LCM of 28 and 136. 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 28 and 136, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 28 and 136?
lcm (28 136) = (?)
28 => 2 x 2 x 7
136 => 2 x 2 x 2 x 17
= 2 x 2 x 7 x 2 x 17
= 952
lcm (28 and 136) = 952
952 is the LCM of 28 and 136.
where,
28 is a positive integer,
136 is a positive integer,
952 is the LCM of 28 and 136,
{2 x 2} in {2 x 2 x 7, 2 x 2 x 2 x 17} are the common factors of 28 and 136,
{7 x 2 x 17} in {2 x 2 x 7, 2 x 2 x 2 x 17} are the uncommon factors of 28 and 136.
Use in Mathematics: LCM of 28 and 136
The below are some of the mathematical applications where lcm of 28 and 136 can be used:
- to find the least number which is exactly divisible by 28 and 136.
- to find the common denominator for two fractions having 28 and 136 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 28 and 136 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 28 seconds and bell B tolls at 136 seconds repeatedly. The answer is that all bells A and B toll together at 952 seconds for the first time, at 1904 seconds for the second time, at 2856 seconds for the third time and so on.
Important Notes: 28 and 136 lcm
The below are the important notes to be remembered while solving the lcm of 28 and 136:
- The common prime factors and the remaining prime factors of 28 and 136 should be multiplied to find the least common multiple of 28 and 136, when solving lcm by using prime factors method.
- The results of lcm of 28 and 136, and the lcm of 136 and 28 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 28 and 136?
The below solved example with step by step work shows how to find what is the lcm of 28 and 136 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 28 and 136?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 28
B = 136
What to be found:
find the lcm of 28 and 136
step 2 Find the prime factors of 28 and 136:
Prime factors of 28 = 2 x 2 x 7
Prime factors of 136 = 2 x 2 x 2 x 17
step 3 Identify the repeated and non-repeated prime factors of 28 and 136:
{2, 2} are the most repeated factors and {7 x 2 x 17} are the non-repeated factors of 28 and 136.
step 4 Find the product of repeated and non-repeated prime factors of 28 and 136:
= 2 x 2 x 7 x 2 x 17
= 952
lcm(28 and 136) = 952
Hence,
lcm of 28 and 136 is 952
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 28 and 136.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 28 and 136
What to be found:
lcm (28, 136) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
28 and 136
step 3 Choose the divisor which divides each or most of the given integers (28 and 136), 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 28 and 136 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 28 | 136 |
| 2 | 14 | 68 |
| 2 | 7 | 34 |
| 7 | 7 | 17 |
| 17 | 1 | 17 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 28 and 136:
= 2 x 2 x 2 x 7 x 17
= 952
LCM(28, 136) = 952
The LCM of two numbers 28 and 136 is 952