Calculators & Converters

    27, 84 and 90 LCM

    LCM - Least Common Multiple Calculator

    LCM of 27, 84 and 90 is equal to 3780. The comprehensive work provides more insight of how to find what is the lcm of 27, 84 and 90 by using prime factors and special division methods, and the example use case of mathematics and real world problems.

    what is the lcm of 27, 84 and 90?
    lcm (27   84   90) = (?)
    27 => 3 x 3 x 3
    84 => 2 x 2 x 3 x 7
    90 => 2 x 3 x 3 x 5

    = 2 x 3 x 3 x 3 x 2 x 7 x 5
    = 3780
    lcm (27, 84 and 90) = 3780
    3780 is the lcm of 27, 84 and 90.

    where,
    27 is a positive integer,
    84 is a positive integer,
    3780 is the lcm of 27, 84 and 90,
    {2, 3, 3} in {3 x 3 x 3, 2 x 2 x 3 x 7, 2 x 3 x 3 x 5} are the most repeated factors of 27, 84 and 90,
    {3, 2, 7, 5} in {3 x 3 x 3, 2 x 2 x 3 x 7, 2 x 3 x 3 x 5} are the the other remaining factors of 27, 84 and 90.

    Use in Mathematics: LCM of 27, 84 and 90
    The below are some of the mathematical applications where lcm of 27, 84 and 90 can be used:

    1. to find the least number which is exactly divisible by 27, 84 and 90.
    2. to find the common denominators for the fractions having 27, 84 and 90 as denominators in the unlike fractions addition or subtraction.
    Use in Real-world Problems: 27, 84 and 90 lcm
    In the context of lcm real world problems, the lcm of 27, 84 and 90 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 27 seconds, B tolls at 84 seconds and C tolls at 90 seconds repeatedly. The answer is that all bells A, B and C toll together at 3780 seconds for the first time, at 7560 seconds for the second time, at 11340 seconds for the third time and so on.

    Important Notes: 27, 84 and 90 lcm
    The below are the important notes to be remembered while solving the lcm of 27, 84 and 90:
    1. The repeated and non-repeated prime factors of 27, 84 and 90 should be multiplied to find the least common multiple of 27, 84 and 90, when solving lcm by using prime factors method.
    2. The results of lcm of 27, 84 and 90 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.
    For values other than 27, 84 and 90, use this below tool:

    How-to: What is the LCM of 27, 84 and 90?

    The below solved example with step by step work shows how to find what is the lcm of 27, 84 and 90 by using either prime factors method and special division method.

    Solved example using prime factors method:
    What is the LCM of 27, 84 and 90?

    step 1 Address the input parameters, values and observe what to be found:
    Input parameters and values:
    A = 27
    B = 84
    C = 90

    What to be found:
    find the lcm of 27, 84 and 90

    step 2 Find the prime factors of 27, 84 and 90:
    Prime factors of 27 = 3 x 3 x 3
    Prime factors of 84 = 2 x 2 x 3 x 7
    Prime factors of 90 = 2 x 3 x 3 x 5

    step 3 Identify the repeated and non-repeated prime factors of 27, 84 and 90:
    {2, 3, 3} are the most repeated factors and {3, 2, 7, 5} are the non-repeated factors of 27, 84 and 90.

    step 4 Find the product of repeated and non-repeated prime factors of 27, 84 and 90:
    = 2 x 3 x 3 x 3 x 2 x 7 x 5
    = 3780
    lcm(20 and 30) = 3780

    Hence,
    lcm of 27, 84 and 90 is 3780


    Solved example using special division method:
    This special division method is the easiest way to understand the entire calculation of what is the lcm of 27, 84 and 90.

    step 1 Address the input parameters, values and observe what to be found:
    Input parameters and values:
    Integers: 27, 84 and 90

    What to be found:
    lcm (27, 84, 90) = ?

    step 2 Arrange the given integers in the horizontal form with space or comma separated format:
    27, 84 and 90

    step 3 Choose the divisor which divides each or most of the given integers (27, 84 and 90), 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 27, 84 and 90 is not divisible by the selected divisor; repeat the same process until all the integers are brought to 1 as like below:

    2278490
    2274245
    3272145
    39715
    3375
    5175
    7171
    111

    step 4 Multiply the divisors to find the lcm of 27, 84 and 90:
    = 2 x 2 x 3 x 3 x 3 x 5 x 7
    = 3780
    LCM(27, 84, 90) = 3780

    The least common multiple for three numbers 27, 84 and 90 is 3780
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