Because of the exception "X = 0" case, this statement is insufficient.
Percentage change:
[(New Value-Old Value)/ Old Value] x 100
Please note: the denominator has "old value".
RCs make or break your GMAT.Practice RCs everyday!
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".
"Confusing-cause-with-effect"
A favorite GMAT CR fallacy.
Example: Every time I dream, I sleep.
RCs make or break your GMAT.Practice RCs everyday!
Angle from a chord at any point on the circumference is the same.
Collective nouns are always singular.
The team is winning. - CorrectPlayers are performing. - Correct
"Confusing-correlation-with-causation"
A favorite GMAT CR fallacy.
Example: Grandma sneezed, so a tornado hit Nebraska.
60% of the learning comes from analyzing mistakes!
Don't exhaust official material early- it's a common mistake.Save it for the last few weeks.
Similar Triangles
All angles are equal.Hence, shape is the same. Size may differ.All corresponding sides, medians, and angle bisectors are in the same ratio; say "k".Areas are in ratio "k^2".
120
Even x Even = EvenEven x Odd = EvenOdd x Odd = Odd
Even + Even = EvenEven + Odd = OddOdd + Odd = EvenOdd + Odd = Even