In DS, when you are able to solve "too easily", you are probably missing a trap.
Q. Which integer is the highest common factor of four positive integers A, B, C, and D?(1) A= 27, B=49.
Unlike what many students will think, this statement is "Sufficient". Because no matter what "C" and "D" are, if HCF of "A" and "B" is 1, the answer is going to be "1".
"Generalization"- The fallacy of making a claim on evidence that is too small.
A favorite GMAT CR fallacy.
Example: At 90, Mr McGill drinks sweetened soda every day and yet, maintains good health. The elderly can, therefore, have sweetened soda every day and, yet, maintain good health.
In DS, an answer is achieved only when the answer is "consistent".
Q. Is X a multiple of 24?(1) X is a multiple of 6.(2) X is a multiple of 4.
X = 24 satisfies both (1) and (2), leads to "Yes".X = 12 satisfies both (1) and (2), leads to "No"."Inconsistent". Hence, insufficient. Answer is E.
Spot the error: Teacher taught that the Earth revolved around the sun.
"revolved" is not correct. It must be "revolves".(Universal truths are always conveyed in simple present tense).
Approach for CR boldface questions:
Step 1: Identify the conclusion.Step 2: Link the bold part(s) with the conclusion.Step 3: Know what to expect from the correct answer choice.Step 4: Eliminate four choices.
In DS, "no" can very well be an answer.
Question: Is X = 7?(1): X is not a prime number.(1) is sufficient. Because (1) leads to "No, X is not equal to 7".
Compound Interest= P[(1+r/100)^n –1]
P: Principle invested.r: Rate of Compound interest.n: Period.
“And” is the only conjunction that can join two singular nouns and make them plural.
Jack and Joe are studying. - CorrectJack along with Joe is studying. - Correct
Practice RCs, everyday!The skill will help you in all sections and question types!!
The mind-map-strategy for RCs
1.Skim through the first paragraph.Take your eyes off the screen.
2. Ask yourself the paragraph's "purpose" .Purpose is always very, very brief.Avoid paraphrasing the details.
3. Skim through the next paragraph.Take your eyes off.Ask yourself the paragraph's "purpose".Link the purpose of the first paragraph with that of the second.
4. Keep repeating Step 3 for all the subsequent paragraphs.
While attempting AWA, type the first and the last paragraphs first.
- This will ensure that your essay will look 'complete', even if you run out of time.- This will give you more time to think about the middle paragraphs.
"Who" vs "Whom" on SC
"Who" is the "subject" form."Whom" is the "object" form.
120
On the GMAT, ensure 'completing' each section.- "no attempts" attract greater penalty than "negative attempts" do.
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