Question

What is the L.C.M of 63,72 and 81

Answer 1

LCM of 63 72 and 81 is 4536Answer:

Step-by-step explanation:

Answer 2

LCM of 63 , 72 , 81 is 4536

Given :

The numbers 63 , 72 , 81

To find :

LCM of 63 , 72 , 81

Concept :

LCM :

For the given two or more numbers LCM is the least number which is exactly divisible by each of the given numbers

Solution :

Step 1 of 3 :

Write down the given numbers

Here the given numbers are 63 , 72 , 81

Step 2 of 3 :

Prime factorise the numbers

63 = 3 × 3 × 7

72 = 2 × 2 × 2 × 3 × 3

81 = 3 × 3 × 3 × 3

Step 3 of 3 :

Find the LCM

We know that for the given two or more numbers LCM is the least number which is exactly divisible by each of the given numbers

Hence the required LCM

= 2 × 2 × 2 × 3 × 3 × 3 × 3 × 7

= 4536

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