LCM of 24, 15 and 61
7320 is the LCM of 24, 15 and 61. 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 24, 15 and 61, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 24, 15 and 61?
lcm (24 15 61) = (?)
24 => 2 x 2 x 2 x 3
15 => 3 x 5
61 => 61
= 3 x 2 x 2 x 2 x 5 x 61
= 7320
lcm (24, 15 and 61) = 7320
The LCM of 24, 15 and 61 is 7320
where,
24 is a positive integer,
15 is a positive integer,
7320 is the LCM of 24, 15 and 61,
{3} in {2 x 2 x 2 x 3, 3 x 5, 61} is the most repeated factors of 24, 15 and 61,
{2, 2, 2, 5, 61} in {2 x 2 x 2 x 3, 3 x 5, 61} are the the other remaining factors of 24, 15 and 61.
Use in Mathematics: LCM of 24, 15 and 61
The below are some of the mathematical applications where lcm of 24, 15 and 61 can be used:
- to find the least number which is exactly divisible by 24, 15 and 61.
- to find the common denominators for the fractions having 24, 15 and 61 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 24, 15 and 61 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 24 seconds, B tolls at 15 seconds and C tolls at 61 seconds repeatedly. The answer is that all bells A, B and C toll together at 7320 seconds for the first time, at 14640 seconds for the second time, at 21960 seconds for the third time and so on.
Important Notes: 24, 15 and 61 lcm
The below are the important notes to be remembered while solving the lcm of 24, 15 and 61:
- The repeated and non-repeated prime factors of 24, 15 and 61 should be multiplied to find the least common multiple of 24, 15 and 61, when solving lcm by using prime factors method.
- The results of lcm of 24, 15 and 61 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 24, 15 and 61?
The below solved example with step by step work shows how to find what is the lcm of 24, 15 and 61 by using either prime factors method and special division method.
Solved example using prime factors method:
What is LCM of 24, 15 and 61?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 24
B = 15
C = 61
What to be found:
Find lcm of 24, 15 and 61
step 2 Find the prime factors of 24, 15 and 61:
Prime factors of 24 = 2 x 2 x 2 x 3
Prime factors of 15 = 3 x 5
Prime factors of 61 = 61
step 3 Identify the repeated and non-repeated prime factors of 24, 15 and 61:
{3} is the most repeated factor and {2, 2, 2, 5, 61} are the non-repeated factors of 24, 15 and 61.
step 4 Find the product of repeated and non-repeated prime factors of 24, 15 and 61:
= 3 x 2 x 2 x 2 x 5 x 61
= 7320
LCM(24, 15 and 61) = 7320
Hence,
The Least Common Multiple of 24, 15 and 61 is 7320
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 24, 15 and 61.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 24, 15 and 61
What to be found:
lcm (24, 15, 61) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
24, 15 and 61
step 3 Choose the divisor which divides each or most of the given integers (24, 15 and 61), 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 24, 15 and 61 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 24 | 15 | 61 |
| 2 | 12 | 15 | 61 |
| 2 | 6 | 15 | 61 |
| 3 | 3 | 15 | 61 |
| 5 | 1 | 5 | 61 |
| 61 | 1 | 1 | 61 |
| 1 | 1 | 1 |
step 4 Multiply the divisors to find the lcm of 24, 15 and 61:
= 2 x 2 x 2 x 3 x 5 x 61
= 7320
LCM(24, 15, 61) = 7320
The LCM of three numbers 24, 15 and 61 is 7320