Question

Find the lcm of 7,18,21

Answer 1

Answer:

LCM (7, 18 and 21) = 126

Step-by-step explanation:

Step 1: Address input parameters & values

Intergers: 7 18 21

LCM (7, 18, 21) = ?

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

7, 18 and 21

Step 3: Choose the divisor which divides each or most of the integers of in the group (7, 18 and 21), 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 7, 18 and 21

7 × 3 × 6 = 21

LCM(7, 18, 21) = 126

The least common multiple for three numbers 7, 18, and 21 is 126