Question

the HCF of 10 15 30 will be​

Answer 1

Given,

The main numbers are = 10,15 and 30

To find,

The highest common factors or HCF of the main numbers.

Solution,

We can find the HCF or Highest Common Factor of the given numbers, by the prime factorization method.

Prime factorization of the given numbers :

10 = 5×2

15 = 5×3

30 = 2×5×3

Common factors = 5

HCF or Highest Common Factor= 5 = 5

Hence, the HCF will be 5

Answer 2

Answer:

10, 15 and 30

Factorize of the above numbers :

10 = 2 • 5

15 = 3 • 5

30 = 2 • 3 • 5

Build a prime factors table

Number of times each prime factor

appears in the factorization of :

Prime

Factor Number

10 Number

15 Number

30 G.C.F

(min)

2 1 0 1 0

3 0 1 1 0

5 1 1 1 1

GCF = 5

Greatest Common Factor is :

5

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