LCM of 49, 81 and 89
353241 is the LCM of 49, 81 and 89. 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 49, 81 and 89, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 49, 81 and 89?
lcm (49 81 89) = (?)
49 => 7 x 7
81 => 3 x 3 x 3 x 3
89 => 89
= 7 x 7 x 3 x 3 x 3 x 3 x 89
= 353241
lcm (49, 81 and 89) = 353241
The LCM of 49, 81 and 89 is 353241
where,
49 is a positive integer,
81 is a positive integer,
353241 is the LCM of 49, 81 and 89,
in {7 x 7, 3 x 3 x 3 x 3, 89} there is no repeated factors of 49, 81 and 89,
{7, 7, 3, 3, 3, 3, 89} in {7 x 7, 3 x 3 x 3 x 3, 89} are the the other remaining factors of 49, 81 and 89.
Use in Mathematics: LCM of 49, 81 and 89
The below are some of the mathematical applications where lcm of 49, 81 and 89 can be used:
- to find the least number which is exactly divisible by 49, 81 and 89.
- to find the common denominators for the fractions having 49, 81 and 89 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 49, 81 and 89 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 49 seconds, B tolls at 81 seconds and C tolls at 89 seconds repeatedly. The answer is that all bells A, B and C toll together at 353241 seconds for the first time, at 706482 seconds for the second time, at 1059723 seconds for the third time and so on.
Important Notes: 49, 81 and 89 lcm
The below are the important notes to be remembered while solving the lcm of 49, 81 and 89:
- The repeated and non-repeated prime factors of 49, 81 and 89 should be multiplied to find the least common multiple of 49, 81 and 89, when solving lcm by using prime factors method.
- The results of lcm of 49, 81 and 89 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 LCM of 49, 81 and 89?
The below solved example with step by step work shows how to find what is the lcm of 49, 81 and 89 by using either prime factors method and special division method.
Solved example using prime factors method:
What is LCM of 49, 81 and 89?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 49
B = 81
C = 89
What to be found:
Find lcm of 49, 81 and 89
step 2 Find the prime factors of 49, 81 and 89:
Prime factors of 49 = 7 x 7
Prime factors of 81 = 3 x 3 x 3 x 3
Prime factors of 89 = 89
step 3Identify the repeated and non-repeated prime factors of 49, 81 and 89:
Since there is no common factors between 49, 81 and 89, multiplying the given numbers directly provides the LCM of
49, 81 and 89.
= 49 x 81 x 89
= 353241
LCM(49, 81 and 89) = 353241
Hence,
The Least Common Multiple of 49, 81 and 89 is 353241
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 49, 81 and 89.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 49, 81 and 89
What to be found:
lcm (49, 81, 89) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
49, 81 and 89
step 3 Choose the divisor which divides each or most of the given integers (49, 81 and 89), 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 49, 81 and 89 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 49 | 81 | 89 |
| 3 | 49 | 27 | 89 |
| 3 | 49 | 9 | 89 |
| 3 | 49 | 3 | 89 |
| 7 | 49 | 1 | 89 |
| 7 | 7 | 1 | 89 |
| 89 | 1 | 1 | 89 |
| 1 | 1 | 1 |
step 4 Multiply the divisors to find the lcm of 49, 81 and 89:
= 3 x 3 x 3 x 3 x 7 x 7 x 89
= 353241
LCM(49, 81, 89) = 353241
The LCM of three numbers 49, 81 and 89 is 353241