Question

Find the LCM of 70 and 90

Answer 1

LCM OF 70 ,90 -


7×10 , 9×10

10 IS COMMON
SO, 10WIOL BE WRITTEN 1 TIME
7×9×10
630 IS THE ANS .

Answer 2

Hey there!

We will find LCM of 70 , 90 by Synthetic division method

$\begin{table}[] \begin{tabular}{c|ll} 2 & 70 , 50 & \\ \cline{1-2} 5 & 35 , 25 & \\ \cline{1-2} & 7 , 5 & \end{tabular} \end{table}$

Therefore, L. C. M = 2 * 5 * 7 * 5 = 350

Or you can do in other method by writing factors

70 = 2 * 5 * 7
50 = 2 * 5 * 5

Common factors = 2 * 5
Uncommon factors = 5 * 7

L. C. M = 2 * 5 * 5 * 7 = 350

Therefore, The LCM of 70 , 50 is 350