Question

(1) Find LCM of 72,90.
Sol-)​

Answer 1

Answer:

360

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Answer 2

★ Have To Find :-

• LCM of 72, 90

★ Solution :-

By using prime factorization method :-

$\Large{ \begin{array}{c|c} \tt 2 & \sf{ 72 , 90} \\ \cline{1-2} \tt 2 & \sf { 36 , 45} \\ \cline{1-2} \tt 2 & \sf{ 18 , 45} \\ \cline{1-2}\tt 3 & \sf{ 9 , 45} \\ \cline{1-2}\tt 3 & \sf{ 3 , 15} \\ \cline{1-2} \tt 5 & \sf{ 1, 5 }\\ \cline{1-2} & \sf{ 1 , 1} \end{array}}$

L.C.M ⇒ 2 × 2 × 2 × 3 × 3 × 5 ↬ 360

Extra Shots :-

➤ What is Prime Factorisation Method ?

• Step 1: Start by dividing the number by the first prime number 2 and continue dividing by 2 until you get a decimal or remainder. Then divide by 3, 5, 7, etc. until the only numbers left are prime numbers.
• Step 2: Write the number as a product of prime numbers.

Note :- Kindly see the mentioned L.C.M through web if not visible in app.