GRE Math - Quantitative Comparison - QC Strategy - Matching Operations
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- Опубліковано 9 лют 2013
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When I performed this problem on my own, I got the variable w under B and -1 under A.
I tell my students that they can also multiply or divide both columns by a negative but they must remember to flip their answer afterward.
you earned my respect !☺
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Some segments in the video are stamped not adjacent to each other
Can we perform operations only on one quantity to make it similar to second quantity? Like If we are given 2 fractions to compare then we typically make numerator or denominator of only one fraction similar to numerator or denominator of other by performing certain operations?
Could you just stop at the first step after subtracting w from both sides, since we know that w is greater than 0, we can tell that 6w + 4 is greater than -2?
when doing the 2x and 3x question, you took too many additional steps. Simply multiplying each side by 1, and then -1 (since x is not given a distinct value, integer, positive, negative, or otherwise.) and you get A and then B, therefore, you know within seconds that the answer is D. There is no need to subtract any amount of x from either side.
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as u r telling everytime the positive is the answer but in some cases the negative is also the answer