Question

find the l.c.m of 20,30,50 using prime factorisation metod​

Answer 1

Answer:

1. Decompose all numbers into prime factors

20 2 10 2 5 5 1 30 2 15 3 5 5 1 50 2 25 5 5 5 1

2. Write all numbers as the product of its prime factors

Prime factors of 20 = 22 . 5

Prime factors of 30 = 2 . 3 . 5

Prime factors of 50 = 2 . 52

3. Choose the common and uncommon prime factors with the greatest exponent

Common prime factors: 2 , 5

Common prime factors with the greatest exponent: 22, 52

Uncommon prime factors: 3

Uncommon prime factors with the greatest exponent: 31

4. Calculate the Least Common Multiple or LCM

Remember, to find the LCM of several numbers you must multiply the common and uncommon prime factors with the greatest exponent of those numbers.

LCM = 22. 52. 31 = 300

Answer 2

Answer:

Ok so here is your answer

Step-by-step explanation:

so it 20-30-50, take the first prime factor as 2 so we will get 10-15-25, again take 2 and we will get 5-15-25 now tae 3 as your prime factor , so we will get 5-5-25, now take 5 as your next prime factor, so we will get 1-1-5 and finally take 5 again so that you get 1-1-1

LCM= product of prime factors

LCM=2*2*3*5*5

Lcm=300

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