LCM of 7 and 9 is equal to 63. The comprehensive work provides more insight of how to find what is the lcm of 7 and 9 by using prime factors and special division methods, and the example use case of mathematics and real world problems.
what is the lcm of 7 and 9?
lcm (7 9) = (?)
7 => 7
9 => 3 x 3
= 7 x 3 x 3
= 63
lcm (7 and 9) = 63
63 is the lcm of 7 and 9.
where,
7 is a positive integer,
9 is a positive integer,
63 is the lcm of 7 and 9,
There is no common factors of 7 and 9 in {7, 3 x 3},
{7 x 3 x 3} in {7, 3 x 3} are the uncommon factors of 7 and 9.
Use in Mathematics: LCM of 7 and 9
The below are some of the mathematical applications where lcm of 7 and 9 can be used:
The below solved example with step by step work shows how to find what is the lcm of 7 and 9 by using prime factors method and division method.
Solved example using prime factors method:
What is the LCM of 7 and 9?
step 1
Address the input parameters, values and observe what to be found:
Input parameters and values:
A = 7
B = 9
What to be found:
find the lcm of 7 and 9
step 2 Find the prime factors of 7 and 9:
Prime factors of 7 = 7
Prime factors of 9 = 3 x 3
step 3Identify the repeated and non-repeated prime factors of 7 and 9:
Since there is no common factors between 7 and 9, multiplying the given numbers directly provides the LCM of
7 and 9.
= 7 x 9
= 63
lcm(7 and 9) = 63
Hence,
lcm of 7 and 9 is 63
3 | 7 | 9 |
3 | 7 | 3 |
7 | 7 | 1 |
1 | 1 |