Project SC Butler: Day 55 Sentence Correction (SC1)

For SC butler Questions Click HereA tablet containing one of the most famous mathematical texts from ancient Mesopotamia proves that the Babylonians

had derived the formula that came later to be called the Pythagorean theorem long before the Greek philosopher Pythagoras would.

A) had derived the formula that came later to be called the Pythagorean theorem long before the Greek philosopher Pythagoras would

B) derived

~~from~~ the formula later called the Pythagorean theorem long before the Greek philosopher Pythagoras did

C) derived what was later called the Pythagorean theorem long before the time in which the Greek philosopher Pythagorean was

D) derived the formula later called the Pythagorean theorem long before the Greek philosopher has

E) derived from the formula later called the Pythagorean theorem long before its derivation by the Greek philosopher Pythagoras

*FACEPALM*

I had a typo in answer choice B.

Everyone gets kudos.

I will edit the original.

OFFICIAL EXPLANATION• The presence of the verb

derived in different forms, as well as the presence of different verbs

at the end of different answer choices indicates that this question is testing

both verb tense and parallel structure.The verb at the end of the sentence must be parallel to the verb at the beginning of the underlined portion.

• (A) is incorrect because

had derived is not parallel to

would.-- In addition,

came later to be should be

later came to be.

The adverb

later modifies the entire clause

that came to be called the Pythagorean theorem. • If we were to write out the full correction, the sentence would read,

A tablet containing one of the most famous mathematical texts from ancient Mesopotamia proves that the Babylonians derived the formula that LATER came to be called the Pythagorean theorem long before the Greek philosopher Pythagoras derived it/the formula.The goal is to find the answer that matches that construction most closely.

• (B) is correct because

did is an appropriate substitute for derived, and both verbs are placed in the simple past.

• C and D are incorrect because

was and

has cannot substitute for

derived,

and because

where in C cannot refer to a time.

On the GMAT, where must be a place, a literal place, such as Elm Street or the Eiffel Tower or "my house."• E is incorrect because it is illogical.

Derived should not be followed by a preposition in this case:

X is derived from Y.The Babylonians derived the formula—they did not derive

from the formula.

COMMENTS• A good rule of thumb: if you can avoid deciding between past perfect and simple past, do so.

1) many people

incorrectly avoid simple past merely because one event in the past happens earlier than the other.

If, as in this case, there is a time sequence word such as LATER, simple past is fine.

We know which action is the "past of the past" without having to use past perfect.

2) Words such as

before, after, previously, and later (and others) signal the time sequence.

We therefore have two events that happened in the past and we do not need "had derived" (for those who rejected B

because it was not framed in past perfect)

Correct: The Mt. Saint Helens volcano

showed signs of trouble long

before it

erupted.

Not necessary, but allowed: The Mt. Saint Helens volcano

had showed signs of trouble long

before it

erupted.Find a different decision point.

A vs. B? In A, 1) had derived and would are not parallel; 2) LATER is misplaced.

*********

Again, I apologize. Nothing like a crazy-making question created by a typo.

Kudos to all.

HAPPY 2019!

_________________

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