80, 90 and 100 LCM
LCM of 80, 90 and 100 is equal to 3600. The comprehensive work provides more insight of how to find what is the lcm of 80, 90 and 100 by using prime factors and special division methods, and the example use case of mathematics and real world problems.
what is the lcm of 80, 90 and 100?
lcm (80 90 100) = (?)
80 => 2 x 2 x 2 x 2 x 5
90 => 2 x 3 x 3 x 5
100 => 2 x 2 x 5 x 5
= 2 x 2 x 5 x 2 x 2 x 3 x 3 x 5
= 3600
lcm (80, 90 and 100) = 3600
3600 is the lcm of 80, 90 and 100.
where,
80 is a positive integer,
90 is a positive integer,
3600 is the lcm of 80, 90 and 100,
{2, 2, 5} in {2 x 2 x 2 x 2 x 5, 2 x 3 x 3 x 5, 2 x 2 x 5 x 5} are the most repeated factors of 80, 90 and 100,
{2, 2, 3, 3, 5} in {2 x 2 x 2 x 2 x 5, 2 x 3 x 3 x 5, 2 x 2 x 5 x 5} are the the other remaining factors of 80, 90 and 100.
Use in Mathematics: LCM of 80, 90 and 100
The below are some of the mathematical applications where lcm of 80, 90 and 100 can be used:
- to find the least number which is exactly divisible by 80, 90 and 100.
- to find the common denominators for the fractions having 80, 90 and 100 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 80, 90 and 100 helps to find the exact time when three similar and recurring 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 all the bells A, B and C toll together, if bell A tolls at 80 seconds, B tolls at 90 seconds and C tolls at 100 seconds repeatedly. The answer is that all bells A, B and C toll together at 3600 seconds for the first time, at 7200 seconds for the second time, at 10800 seconds for the third time and so on.
Important Notes: 80, 90 and 100 lcm
The below are the important notes to be remembered while solving the lcm of 80, 90 and 100:
- The repeated and non-repeated prime factors of 80, 90 and 100 should be multiplied to find the least common multiple of 80, 90 and 100, when solving lcm by using prime factors method.
- The results of lcm of 80, 90 and 100 is identical even if we change the order of given numbers in the lcm calculation, it means the order of given numbers in the lcm calculation doesn't affect the results.
How-to: What is the LCM of 80, 90 and 100?
Solved example using prime factors method:
What is the LCM of 80, 90 and 100?
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 80
B = 90
C = 100
What to be found:
find the lcm of 80, 90 and 100
step 2 Find the prime factors of 80, 90 and 100:
Prime factors of 80 = 2 x 2 x 2 x 2 x 5
Prime factors of 90 = 2 x 3 x 3 x 5
Prime factors of 100 = 2 x 2 x 5 x 5
step 3 Identify the repeated and non-repeated prime factors of 80, 90 and 100:
{2, 2, 5} are the most repeated factors and {2, 2, 3, 3, 5} are the non-repeated factors of 80, 90 and 100.
step 4 Find the product of repeated and non-repeated prime factors of 80, 90 and 100:
= 2 x 2 x 5 x 2 x 2 x 3 x 3 x 5
= 3600
lcm(20 and 30) = 3600
Hence,
lcm of 80, 90 and 100 is 3600
This special division method is the easiest way to understand the entire calculation of what is the lcm of 80, 90 and 100.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 80, 90 and 100
What to be found:
lcm (80, 90, 100) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
80, 90 and 100
step 3 Choose the divisor which divides each or most of the given integers (80, 90 and 100), 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 80, 90 and 100 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 80 | 90 | 100 |
| 2 | 40 | 45 | 50 |
| 2 | 20 | 45 | 25 |
| 2 | 10 | 45 | 25 |
| 3 | 5 | 45 | 25 |
| 3 | 5 | 15 | 25 |
| 5 | 5 | 5 | 25 |
| 5 | 1 | 1 | 5 |
| 1 | 1 | 1 |
step 4 Multiply the divisors to find the lcm of 80, 90 and 100:
= 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5
= 3600
LCM(80, 90, 100) = 3600
The least common multiple for three numbers 80, 90 and 100 is 3600