Question

find the LCM of 24, 40, 84 by divison method​

Answer 1

Given:

a = 24

b = 40

c = 84

To find:

Find the LCM of 24, 40, 84 by division method​.

Solution:

2 | 24 , 40 , 84

2 | 12 , 20  , 42

2 | 6  , 10   , 21

3 | 3  ,  5    , 7  

5 | 1   ,  5    , 7  

7 | 1   ,  1     , 7    

  | 1   ,  1     , 1

∴ LCM = 2 × 2 × 2 × 3 × 5 × 7

LCM = 840

Therefore, the  LCM of 24, 40, 84 by division method​ is 840

Answer 2

Given:

24, 40, 84

To find

LCM

Solution :

The following is the process of the LCM of 24, 40, 84 by division method:

$\begin{array}{r | l} 2 & 24, 40, 84 \\ \cline{2-2} 2 & 12, 20, 42 \\ \cline{2-2} 2 & 6, 10, 21 \\ \cline{2-2} 3 & 3, 5, 21 \\ \cline{2-2} 5 & 1, 5, 7 \\ \cline{2-2} 7 & 1, 1, 7 \\ \cline{2-2} & 1, 1, 1 \\ \cline{2-2} \end{array}$

LCM = 2 x 2 x 2 x 3 x 5 x 7 = 840.

Hence, the required answer LCM is 840