LCM of 7 and 215
1505 is the LCM of 7 and 215. 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 7 and 215, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 7 and 215?
lcm (7 215) = (?)
7 => 7
215 => 5 x 43
= 7 x 5 x 43
= 1505
lcm (7 and 215) = 1505
1505 is the LCM of 7 and 215.
where,
7 is a positive integer,
215 is a positive integer,
1505 is the LCM of 7 and 215,
There is no common factors of 7 and 215 in {7, 5 x 43},
{7 x 5 x 43} in {7, 5 x 43} are the uncommon factors of 7 and 215.
Use in Mathematics: LCM of 7 and 215
The below are some of the mathematical applications where lcm of 7 and 215 can be used:
- to find the least number which is exactly divisible by 7 and 215.
- to find the common denominator for two fractions having 7 and 215 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 7 and 215 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 7 seconds and bell B tolls at 215 seconds repeatedly. The answer is that all bells A and B toll together at 1505 seconds for the first time, at 3010 seconds for the second time, at 4515 seconds for the third time and so on.
Important Notes: 7 and 215 lcm
The below are the important notes to be remembered while solving the lcm of 7 and 215:
- The common prime factors and the remaining prime factors of 7 and 215 should be multiplied to find the least common multiple of 7 and 215, when solving lcm by using prime factors method.
- The results of lcm of 7 and 215, and the lcm of 215 and 7 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 7 and 215?
The below solved example with step by step work shows how to find what is the lcm of 7 and 215 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 7 and 215?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 7
B = 215
What to be found:
find the lcm of 7 and 215
step 2 Find the prime factors of 7 and 215:
Prime factors of 7 = 7
Prime factors of 215 = 5 x 43
step 3Identify the repeated and non-repeated prime factors of 7 and 215:
Since there is no common factors between 7 and 215, multiplying the given numbers directly provides the LCM of
7 and 215.
= 7 x 215
= 1505
lcm(7 and 215) = 1505
Hence,
lcm of 7 and 215 is 1505
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 7 and 215.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 7 and 215
What to be found:
lcm (7, 215) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
7 and 215
step 3 Choose the divisor which divides each or most of the given integers (7 and 215), 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 7 and 215 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 5 | 7 | 215 |
| 7 | 7 | 43 |
| 43 | 1 | 43 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 7 and 215:
= 5 x 7 x 43
= 1505
LCM(7, 215) = 1505
The LCM of two numbers 7 and 215 is 1505