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Q.

Find the HCF of 15, 25 and 35.

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a

2

b

3

c

4

d

5

answer is D.

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Detailed Solution

detailed_solution_thumbnail

Prime factorization of 15, 25 and 35 is:

15 = 3×5

25 = 5×5

35 = 5×7

As visible, 15, 25 and 35 have only one common prime factor i.e. 5.

Hence, the HCF of 15, 25 and 35 is 5.

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Find the HCF of 15, 25 and 35.