LCM of 129 and 170
21930 is the LCM of 129 and 170. 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 129 and 170, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 129 and 170?
lcm (129 170) = (?)
129 => 3 x 43
170 => 2 x 5 x 17
= 3 x 43 x 2 x 5 x 17
= 21930
lcm (129 and 170) = 21930
21930 is the LCM of 129 and 170.
where,
129 is a positive integer,
170 is a positive integer,
21930 is the LCM of 129 and 170,
There is no common factors of 129 and 170 in {3 x 43, 2 x 5 x 17},
{3 x 43 x 2 x 5 x 17} in {3 x 43, 2 x 5 x 17} are the uncommon factors of 129 and 170.
Use in Mathematics: LCM of 129 and 170
The below are some of the mathematical applications where lcm of 129 and 170 can be used:
- to find the least number which is exactly divisible by 129 and 170.
- to find the common denominator for two fractions having 129 and 170 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 129 and 170 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 129 seconds and bell B tolls at 170 seconds repeatedly. The answer is that all bells A and B toll together at 21930 seconds for the first time, at 43860 seconds for the second time, at 65790 seconds for the third time and so on.
Important Notes: 129 and 170 lcm
The below are the important notes to be remembered while solving the lcm of 129 and 170:
- The common prime factors and the remaining prime factors of 129 and 170 should be multiplied to find the least common multiple of 129 and 170, when solving lcm by using prime factors method.
- The results of lcm of 129 and 170, and the lcm of 170 and 129 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 129 and 170?
The below solved example with step by step work shows how to find what is the lcm of 129 and 170 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 129 and 170?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 129
B = 170
What to be found:
find the lcm of 129 and 170
step 2 Find the prime factors of 129 and 170:
Prime factors of 129 = 3 x 43
Prime factors of 170 = 2 x 5 x 17
step 3Identify the repeated and non-repeated prime factors of 129 and 170:
Since there is no common factors between 129 and 170, multiplying the given numbers directly provides the LCM of
129 and 170.
= 129 x 170
= 21930
lcm(129 and 170) = 21930
Hence,
lcm of 129 and 170 is 21930
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 129 and 170.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 129 and 170
What to be found:
lcm (129, 170) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
129 and 170
step 3 Choose the divisor which divides each or most of the given integers (129 and 170), 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 129 and 170 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 129 | 170 |
| 3 | 129 | 85 |
| 5 | 43 | 85 |
| 17 | 43 | 17 |
| 43 | 43 | 1 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 129 and 170:
= 2 x 3 x 5 x 17 x 43
= 21930
LCM(129, 170) = 21930
The LCM of two numbers 129 and 170 is 21930