Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Sentence Correction: Parts of Speech - Articles

There are less than 60 Javan rhinos in the world today and specialists are unsure whether the species can recover its numbers.

This answer choice is grammatically incorrect: the article less can describe only non-count nouns whereas the noun rhinos is a count noun.

What helps us identify this mistake is the following Stop Sign:

much, (a) little, less, the amount of

This answer choice is grammatically incorrect and repeats the original Parts of Speech error: the article Less can describe only non-count nouns whereas the noun rhinos is a count noun.

What helps us identify this mistake is the following Stop Sign:

much, (a) little, less, the amount of

Although this answer choice corrects the original Parts of Speech error by using fewer to describe the plural count noun rhinos, in the GMAT, the addition of the phrase or not at any point after the word whether is considered redundant and, therefore, a stylistic error. Look for a more concise answer choice.

Although this answer choice corrects the original Parts of Speech error by using fewer to describe the plural count noun rhinos, in the GMAT, If is used in Conditionals only. If you see if in a sentence and there's no condition, you should replace if with whether.

Think of whether as a choice between two possibilities dealing with the same subject or as a yes/no question.

Example: I do not know whether this will work. (yes or no)

He was not sure whether he wanted banana or chocolate cake. (a choice between 2 possibilities)

Great!

This answer choice corrects the original Parts of Speech error by using the article fewer to describe a plural count noun (rhinos).

There are less than 60 Javan rhinos in the world today and specialists are unsure whether the species can recover its numbers
Less than 60 Javan rhinos remain in the world today and specialists are unsure whether the species can recover its numbers
There are fewer than 60 Javan rhinos in the world today and specialists are unsure whether the species can recover its numbers or not
Fewer than 60 Javan rhinos remain in the world today and specialists are unsure whether the species can recover its numbers
Fewer than 60 Javan rhinos remain in the world today and specialists are unsure if the species can recover its numbers