Question

find the LCM of division method 15,20and 18​

Answer 1

Answer:

180

Step-by-step explanation:

Step 1: Write the given numbers in a horizontal line, separating them by commas.

Step 2: Divide them by a suitable prime number, which exactly divides at least two of the given numbers.

Step 3: We put the quotient directly under the numbers in the next row. If the number is not divided exactly, we bring it down in the next row.

Step 4: We continue the process of step 2 and step 3 until all co-prime numbers are left in the last row.

Step 5: We multiply all the prime numbers by which we have divided and the co-prime numbers left in the last row. This product is the least common multiple of the given numbers.

Answer 2

Answer:

LCM(15, 18 and 20) = 180

The least common multiple 180 is a product of common & odd prime factors between the integers which is divisible by each one an integer of this same group. The step by step work for LCM of 15, 18 and 20 may useful to understand how to find LCM for two or three numbers.

How to find LCM(15, 18, 20)?

Problem & Workout :

step 1 Address input parameters & values.

Integers: 15 18 20

lcm (15, 18, 20) = ?

step 2 Arrange the group of numbers in the horizontal form with space or comma separated format

15, 18 and 20

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.

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 for three numbers 15, 18 and 20 is 180

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