87 and 145 LCM
LCM of 87 and 145 is equal to 435. The comprehensive work provides more insight of how to find what is the lcm of 87 and 145 by using prime factors and special division methods, and the example use case of mathematics and real world problems.
what is the lcm of 87 and 145?
lcm (87 145) = (?)
87 => 3 x 29
145 => 5 x 29
= 29 x 3 x 5
= 435
lcm (87 and 145) = 435
435 is the lcm of 87 and 145.
where,
87 is a positive integer,
145 is a positive integer,
435 is the lcm of 87 and 145,
{29} in {3 x 29, 5 x 29} is the common factors of 87 and 145,
{3 x 5} in {3 x 29, 5 x 29} are the uncommon factors of 87 and 145.
Use in Mathematics: LCM of 87 and 145
The below are some of the mathematical applications where lcm of 87 and 145 can be used:
- to find the least number which is exactly divisible by 87 and 145.
- to find the common denominator for two fractions having 87 and 145 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 87 and 145 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 87 seconds and bell B tolls at 145 seconds repeatedly. The answer is that all bells A and B toll together at 435 seconds for the first time, at 870 seconds for the second time, at 1305 seconds for the third time and so on.
Important Notes: 87 and 145 lcm
The below are the important notes to be remembered while solving the lcm of 87 and 145:
- The common prime factors and the remaining prime factors of 87 and 145 should be multiplied to find the least common multiple of 87 and 145, when solving lcm by using prime factors method.
- The results of lcm of 87 and 145, and the lcm of 145 and 87 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 87 and 145?
The below solved example with step by step work shows how to find what is the lcm of 87 and 145 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 87 and 145?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 87
B = 145
What to be found:
find the lcm of 87 and 145
step 2 Find the prime factors of 87 and 145:
Prime factors of 87 = 3 x 29
Prime factors of 145 = 5 x 29
step 3 Identify the repeated and non-repeated prime factors of 87 and 145:
{29} is the most repeated factor and {3 x 5} are the non-repeated factors of 87 and 145.
step 4 Find the product of repeated and non-repeated prime factors of 87 and 145:
= 29 x 3 x 5
= 435
lcm(87 and 145) = 435
Hence,
lcm of 87 and 145 is 435
This special division method is the easiest way to understand the entire calculation of what is the lcm of 87 and 145.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 87 and 145
What to be found:
lcm (87, 145) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
87 and 145
step 3 Choose the divisor which divides each or most of the given integers (87 and 145), 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 87 and 145 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 87 | 145 |
| 5 | 29 | 145 |
| 29 | 29 | 29 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 87 and 145:
= 3 x 5 x 29
= 435
LCM(87, 145) = 435
The least common multiple for two numbers 87 and 145 is 435