Source: Official Guide for the GMAT 13th Ed. Data Sufficiency; #64 Official Guide for the GMAT 2015 14th Ed. Data Sufficiency; #64

1

How many integers are there between, but

How many integers are there between, but not including, integers r and s?

3 Explanations

1

Troy Moeckel

I wanted to mention it. If we take out two numbers, the difference is the number between the two numbers.

Apr 14, 2017 • Comment

Cydney Seigerman, Magoosh Tutor

Hi Troy! Thanks your comment :) It would be great if you could elaborate a little on what you mean! Thank you!

Apr 16, 2017 • Reply

1

DINO JOY

The answer choice should be B, because its not mentioned in the question that integers from r to s are consecutive. Can anyone please clarify ?

Dec 2, 2016 • Comment

Cydney Seigerman, Magoosh Tutor

Hi Dino :)

The question asks, "How many integers are there between, but not including, integers r and s?" In other words, the question is asking about all of the integers from r to s, which is another way of saying the number of consecutive integers between the two variables. The prompt does not need to explicitly reference the idea of consecutive integers, because a list of all of the integers within a certain range is the same as a list of the consecutive integers within that range. With that in mind, Statement 1 is sufficient and the answer is (D).

I hope this helps! :)

Dec 5, 2016 • Reply

1

Gravatar Mike McGarry, Magoosh Tutor

Jan 4, 2014 • Comment

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Section 6.3 Data Sufficiency

Section 6.3 Data Sufficiency

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