Integers foundation doubt

[user4970]

Hey Greg,

I had a doubt on a problem discussed in the first Quant Foundation class in the 2 month plan for Integers and Primes.

For this problem below, you took a=3, b=2, c=1, and got the answer to be 2. While that is correct, are there no possible edge cases here?

I did try with several different values and the answer always came to be 2, which I understand is correct, but I’m interested to learn the thought process here. When a student asked a similar question, you mentioned how this is a Problem Solving type question, and not a Quant comparison one.

Can you help explain what that differentiation would be? Curious to learn if this is a strategy that can be applied moving forward as well without having to worry about edge cases.

Regards,
Ratik

[cylverixxx]

@user4970

While that is correct, are there no possible edge cases here?

Let a = c + 2 and b = c + 1

@user4970

When a student asked a similar question, you mentioned how this is a Problem Solving type question, and not a Quant comparison one.

Can you help explain what that differentiation would be?

Choosing only one set of numbers won’t guarantee the correct answer for a Quantitative Comparison question, but it can for a multiple-choice question provided that you arrive at one of the given choices correctly.

I think it’s common sense, so I wouldn’t stress too much about it.