LCM of 7 and 80
560 is the LCM of 7 and 80. 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 80, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 7 and 80?
lcm (7 80) = (?)
7 => 7
80 => 2 x 2 x 2 x 2 x 5
= 7 x 2 x 2 x 2 x 2 x 5
= 560
lcm (7 and 80) = 560
560 is the LCM of 7 and 80.
where,
7 is a positive integer,
80 is a positive integer,
560 is the LCM of 7 and 80,
There is no common factors of 7 and 80 in {7, 2 x 2 x 2 x 2 x 5},
{7 x 2 x 2 x 2 x 2 x 5} in {7, 2 x 2 x 2 x 2 x 5} are the uncommon factors of 7 and 80.
Use in Mathematics: LCM of 7 and 80
The below are some of the mathematical applications where lcm of 7 and 80 can be used:
- to find the least number which is exactly divisible by 7 and 80.
- to find the common denominator for two fractions having 7 and 80 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 7 and 80 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 80 seconds repeatedly. The answer is that all bells A and B toll together at 560 seconds for the first time, at 1120 seconds for the second time, at 1680 seconds for the third time and so on.
Important Notes: 7 and 80 lcm
The below are the important notes to be remembered while solving the lcm of 7 and 80:
- The common prime factors and the remaining prime factors of 7 and 80 should be multiplied to find the least common multiple of 7 and 80, when solving lcm by using prime factors method.
- The results of lcm of 7 and 80, and the lcm of 80 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 80?
The below solved example with step by step work shows how to find what is the lcm of 7 and 80 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 7 and 80?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 7
B = 80
What to be found:
find the lcm of 7 and 80
step 2 Find the prime factors of 7 and 80:
Prime factors of 7 = 7
Prime factors of 80 = 2 x 2 x 2 x 2 x 5
step 3Identify the repeated and non-repeated prime factors of 7 and 80:
Since there is no common factors between 7 and 80, multiplying the given numbers directly provides the LCM of
7 and 80.
= 7 x 80
= 560
lcm(7 and 80) = 560
Hence,
lcm of 7 and 80 is 560
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 7 and 80.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 7 and 80
What to be found:
lcm (7, 80) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
7 and 80
step 3 Choose the divisor which divides each or most of the given integers (7 and 80), 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 80 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 2 | 7 | 80 |
| 2 | 7 | 40 |
| 2 | 7 | 20 |
| 2 | 7 | 10 |
| 5 | 7 | 5 |
| 7 | 7 | 1 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 7 and 80:
= 2 x 2 x 2 x 2 x 5 x 7
= 560
LCM(7, 80) = 560
The LCM of two numbers 7 and 80 is 560