LCM of 7 and 99
693 is the LCM of 7 and 99. 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 99, provided along with the use cases of mathematics and real-world problems.
what is the lcm of 7 and 99?
lcm (7 99) = (?)
7 => 7
99 => 3 x 3 x 11
= 7 x 3 x 3 x 11
= 693
lcm (7 and 99) = 693
693 is the LCM of 7 and 99.
where,
7 is a positive integer,
99 is a positive integer,
693 is the LCM of 7 and 99,
There is no common factors of 7 and 99 in {7, 3 x 3 x 11},
{7 x 3 x 3 x 11} in {7, 3 x 3 x 11} are the uncommon factors of 7 and 99.
Use in Mathematics: LCM of 7 and 99
The below are some of the mathematical applications where lcm of 7 and 99 can be used:
- to find the least number which is exactly divisible by 7 and 99.
- to find the common denominator for two fractions having 7 and 99 as denominators in the unlike fractions addition or subtraction.
In the context of lcm real world problems, the lcm of 7 and 99 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 99 seconds repeatedly. The answer is that all bells A and B toll together at 693 seconds for the first time, at 1386 seconds for the second time, at 2079 seconds for the third time and so on.
Important Notes: 7 and 99 lcm
The below are the important notes to be remembered while solving the lcm of 7 and 99:
- The common prime factors and the remaining prime factors of 7 and 99 should be multiplied to find the least common multiple of 7 and 99, when solving lcm by using prime factors method.
- The results of lcm of 7 and 99, and the lcm of 99 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 99?
The below solved example with step by step work shows how to find what is the lcm of 7 and 99 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 7 and 99?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 7
B = 99
What to be found:
find the lcm of 7 and 99
step 2 Find the prime factors of 7 and 99:
Prime factors of 7 = 7
Prime factors of 99 = 3 x 3 x 11
step 3Identify the repeated and non-repeated prime factors of 7 and 99:
Since there is no common factors between 7 and 99, multiplying the given numbers directly provides the LCM of
7 and 99.
= 7 x 99
= 693
lcm(7 and 99) = 693
Hence,
lcm of 7 and 99 is 693
This special division method is one of the easiest ways to understand the entire calculation to find the LCM of 7 and 99.
step 1 Address the input parameters, values and observe what to be found:
Input parameters and values:
Integers: 7 and 99
What to be found:
lcm (7, 99) = ?
step 2 Arrange the given integers in the horizontal form with space or comma separated format:
7 and 99
step 3 Choose the divisor which divides each or most of the given integers (7 and 99), 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 99 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:
| 3 | 7 | 99 |
| 3 | 7 | 33 |
| 7 | 7 | 11 |
| 11 | 1 | 11 |
| 1 | 1 |
step 4 Multiply the divisors to find the lcm of 7 and 99:
= 3 x 3 x 7 x 11
= 693
LCM(7, 99) = 693
The LCM of two numbers 7 and 99 is 693