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If the HCF of 51 and 85 is expressed in the form of 51m – 85, then the value of m will be:
Question

If the HCF of 51 and 85 is expressed in the form of 51m – 85, then the value of m will be:

A.

1

B.

5

C.

3

D.

2

Correct option is D

Given:

Two numbers: 51 and 85 HCF of 51 and 85 is expressed in the form 51m−85.

Solution:

51=3×1751 = 3 ×17​​

​​85=5×1785 = 5\times 17

So, HCF of 51 and 85 is 17.

According to question,

17 = 51m−85

51m = 17 + 85

51m = 102

m =10251\frac{102}{51} = 2​

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