# 129 and 172 LCM LCM of 129 and 172 is equal to 516. The comprehensive work provides more insight of how to find what is the lcm of 129 and 172 by using prime factors and special division methods, and the example use case of mathematics and real world problems.

what is the lcm of 129 and 172?
lcm (129   172) = (?)
129 => 3 x 43
172 => 2 x 2 x 43

= 43 x 3 x 2 x 2
= 516
lcm (129 and 172) = 516
516 is the lcm of 129 and 172.

where,
129 is a positive integer,
172 is a positive integer,
516 is the lcm of 129 and 172,
{43} in {3 x 43, 2 x 2 x 43} is the common factors of 129 and 172,
{3 x 2 x 2} in {3 x 43, 2 x 2 x 43} are the uncommon factors of 129 and 172.

Use in Mathematics: LCM of 129 and 172
The below are some of the mathematical applications where lcm of 129 and 172 can be used:

1. to find the least number which is exactly divisible by 129 and 172.
2. to find the common denominator for two fractions having 129 and 172 as denominators in the unlike fractions addition or subtraction.
Use in Real-world Problems: 129 and 172 lcm
In the context of lcm real world problems, the lcm of 129 and 172 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 172 seconds repeatedly. The answer is that all bells A and B toll together at 516 seconds for the first time, at 1032 seconds for the second time, at 1548 seconds for the third time and so on.

Important Notes: 129 and 172 lcm
The below are the important notes to be remembered while solving the lcm of 129 and 172:
1. The common prime factors and the remaining prime factors of 129 and 172 should be multiplied to find the least common multiple of 129 and 172, when solving lcm by using prime factors method.
2. The results of lcm of 129 and 172, and the lcm of 172 and 129 are identical, it means the order of given numbers in the lcm calculation doesn't affect the results.
For values other than 129 and 172, use this below tool:

## How-to: What is the LCM of 129 and 172?

The below solved example with step by step work shows how to find what is the lcm of 129 and 172 by using prime factors method and division method.

Solved example using prime factors method:
What is the LCM of 129 and 172?

step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 129
B = 172

What to be found:
find the lcm of 129 and 172

step 2 Find the prime factors of 129 and 172:
Prime factors of 129 = 3 x 43
Prime factors of 172 = 2 x 2 x 43

step 3 Identify the repeated and non-repeated prime factors of 129 and 172:
{43} is the most repeated factor and {3 x 2 x 2} are the non-repeated factors of 129 and 172.

step 4 Find the product of repeated and non-repeated prime factors of 129 and 172:
= 43 x 3 x 2 x 2
= 516
lcm(129 and 172) = 516

Hence,
lcm of 129 and 172 is 516

Solved example using special division method:
This special division method is the easiest way to understand the entire calculation of what is the lcm of 129 and 172.

step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 129 and 172

What to be found:
lcm (129, 172) = ?

step 2 Arrange the given integers in the horizontal form with space or comma separated format:
129 and 172

step 3 Choose the divisor which divides each or most of the given integers (129 and 172), 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 172 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:

 2 129 172 2 129 86 3 129 43 43 43 43 1 1

step 4 Multiply the divisors to find the lcm of 129 and 172:
= 2 x 2 x 3 x 43
= 516
LCM(129, 172) = 516

The least common multiple for two numbers 129 and 172 is 516 