GMATmission wrote:
I did it like this:
We know that a/b =2.86, which means the decimal part i.e. 0.86 = Remainder/Divisor
Simplifying the equation, we get Remainder/Divisor = 43/50. So the divisor should be a multiple of 50.Hence answer is E.
Where am I going wrong?
You have to understand the meaning of divisor in this question. Here it just refers to a factor. It asks you the divisor of a (so that remainder becomes zero). If remainder isn't zero, it will be called the divisor for the total division and not just for the dividend. Basically you take divisor as a factor in this question. 50 is the divisor in this division so that the remainder comes as a factor of 43.
On second thoughts answer i 50 I'm damn sure. Haha, divisor does refer to b in this case just like GMATmission said.
You can cross-check this way, a,b are integers, so b*2.86 should give an integer. 50 is the answer.
Again question should have said 'the divisor' maybe. 'a divisor' is really confusing. But i'd go with 50 if i'veto.