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Re: Let b and x be positive integers. If b is the greatest divisor of x th [#permalink]
I picked D: Why is it A?
St 1 - x^2 = b -->x = b * b
Thus,x > 2b > b (as asked by the question. I think I have made a mistake here in the interpretation of the question). Thus x is the largest value here.

St 2 --> 2b = x--> 2b/b = 2. So, one factor is 2. b = x/2. What I got was --> x > b and x = 2b. So I am not sure why its not suff
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Let b and x be positive integers. If b is the greatest divisor of x th [#permalink]
Madhavi1990 wrote:
I picked D: Why is it A?
St 1 - x^2 = b -->x = b * b
Thus,x > 2b > b (as asked by the question. I think I have made a mistake here in the interpretation of the question). Thus x is the largest value here.

St 2 --> 2b = x--> 2b/b = 2. So, one factor is 2. b = x/2. What I got was --> x > b and x = 2b. So I am not sure why its not suff


Hi Madhavi1990

I think you interpreted the question wrongly. we need to calculate sum of divisors of x but you are focusing only on the greatest divisor of x i.e b. for statement 2 if b=6, then x=12 and it will have other factors as well apart from 2.
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Let b and x be positive integers. If b is the greatest divisor of x th [#permalink]
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