Question

find the lcm of 4,20,9,45,30,40​

Answer 1

Step-by-step explanation:

$2|{\underline {4,20,9,45,30,40}}$

$2|{\underline{2,10,9,45,15,20}}$

$2|{\underline{1,5,9,45,15,10}}$

$3|{\underline{1,5,9,45,15,5}}$

$3|{\underline{1,5,3,15,5,5}}$

$5|{\underline{1,5,1,5,5,5,}}$

$\:\:\:1,1,1,1,1,1$

LCM:-

${:}\longrightarrow$2×2×2×3×3×5

${:}\longrightarrow$8×9×5

${:}\longrightarrow$360

Answer 2

Answer:

∣

4,20,9,45,30,40

2|{\underline{2,10,9,45,15,20}}2∣

2,10,9,45,15,20

2|{\underline{1,5,9,45,15,10}}2∣

1,5,9,45,15,10

3|{\underline{1,5,9,45,15,5}}3∣

1,5,9,45,15,5

3|{\underline{1,5,3,15,5,5}}3∣

1,5,3,15,5,5

5|{\underline{1,5,1,5,5,5,}}5∣

1,5,1,5,5,5,

\:\:\:1,1,1,1,1,11,1,1,1,1,1

LCM:-

{:}\longrightarrow:⟶ 2×2×2×3×3×5

{:}\longrightarrow:⟶ 8×9×5

{:}\longrightarrow:⟶ 360