Question

hcf of 72,126,270 is​

Answer 1

Answer:

Decompose all numbers into prime factors

72 2 36 2 18 2 9 3 3 3 1 126 2 63 3 21 3 7 7 1 270 2 135 3 45 3 15 3 5 5 1

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

Prime factors of 72 = 23 . 32

Prime factors of 126 = 2 . 32 . 7

Prime factors of 270 = 2 . 33 . 5

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2 , 3

Common prime factors with the lowest exponent: 21, 32

4. Calculate the Greatest Common Factor or GCF

Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.

GCF = 21. 32 = 18

Step-by-step explanation:

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Answer 2

Answer:

HCF of 72,126,270 is 18