LCM of 155 and 221
34255 is the LCM of 155 and 221. 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 155 and 221, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 155 and 221?
lcm (155 221) = (?)
155 => 5 x 31
221 => 13 x 17
= 5 x 31 x 13 x 17
= 34255
lcm (155 and 221) = 34255
34255 is the LCM of 155 and 221.
where,
155 is a positive integer,
221 is a positive integer,
34255 is the LCM of 155 and 221,
There is no common factors of 155 and 221 in {5 x 31, 13 x 17},
{5 x 31 x 13 x 17} in {5 x 31, 13 x 17} are the uncommon factors of 155 and 221.
Use in Mathematics: LCM of 155 and 221
The below are some of the mathematical applications where lcm of 155 and 221 can be used:
- to find the least number which is exactly divisible by 155 and 221.
- to find the common denominator for two fractions having 155 and 221 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 155 and 221 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 155 seconds and bell B tolls at 221 seconds repeatedly. The answer is that all bells A and B toll together at 34255 seconds for the first time, at 68510 seconds for the second time, at 102765 seconds for the third time and so on.
Important Notes: 155 and 221 lcm
The below are the important notes to be remembered while solving the lcm of 155 and 221:
- The common prime factors and the remaining prime factors of 155 and 221 should be multiplied to find the least common multiple of 155 and 221, when solving lcm by using prime factors method.
- The results of lcm of 155 and 221, and the lcm of 221 and 155 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 155 and 221?
The below solved example with step by step work shows how to find what is the lcm of 155 and 221 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 155 and 221?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 155
B = 221
What to be found:
find the lcm of 155 and 221
step 2 Find the prime factors of 155 and 221:
Prime factors of 155 = 5 x 31
Prime factors of 221 = 13 x 17
step 3Identify the repeated and non-repeated prime factors of 155 and 221:
Since there is no common factors between 155 and 221, multiplying the given numbers directly provides the LCM of
155 and 221.
= 155 x 221
= 34255
lcm(155 and 221) = 34255
Hence,
lcm of 155 and 221 is 34255
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 155 and 221.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 155 and 221
What to be found:
lcm (155, 221) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
155 and 221
step 3 Choose the divisor which divides each or most of the given integers (155 and 221), 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 155 and 221 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 5 | 155 | 221 |
| 13 | 31 | 221 |
| 17 | 31 | 17 |
| 31 | 31 | 1 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 155 and 221:
= 5 x 13 x 17 x 31
= 34255
LCM(155, 221) = 34255
The LCM of two numbers 155 and 221 is 34255