Question

find the LCM of numbers factorisation method 15,18.20
for 6 th standard
​

Answer 1

How to find LCM 15, 18, 20 ?

• Follow the below steps to find the least common multiple of given group of integers or whole numbers 15, 18 and 20 by using the most efficient and easiest method.

$\longmapsto\underline \red{Step\:1}$

• Address input parameters & values. Integers: 15 18 20 Lcm (15, 18, 20) = ?

$\longmapsto\underline \red{Step\:2}$

• Arrange the group of numbers in the horizontal form with space or comma separated format 15, 18 and 20

$\longmapsto\underline \red{Step\:3}$

• Choose the divisor which divides each or most of the integers of in the group (15, 18 and 20), 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 the integer is not divisible by the divisor. Repeat the same process until all the integers are brought to 1.

$\longmapsto\underline \red{Step\:4}$

• Multiply the divisors to find the lcm of 15, 18 and 20

• 3 x 2 x 5 x 3 x 2 = 180

• LCM(15, 18, 20) = 180

The least common multiple (LCM) for three numbers 15, 18 and 20 is 180.

Answer 2

Answer:

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