GMAT Quant

Question 1

Answer 1

MPrep Class 2, C - Fractions

Ugly question stem = simplify FIRST

**Careless Mistake - MUST distribute the division across both terms

Question 2

Answer 2

PS 8 - C - Fractions

look at the answer choices FIRST (estimate)

Don’t jump into computation + look for patterns to avoid (parenthesis were hiding the canceling)

Question 3

Answer 3

MPrep, Ratios - D

To combine multiple ratios, line up in : form

Common “denominator” in ratios is just where they match

Question 4

Answer 4

MPrep - B

NO REAL NUMBERS GIVEN = Smart Numbers

Fractional, percent, multiplicative relationships = RATIOS

**Make a table to stay organized

Question 5

Answer 5

PS MPrep - C

• ANSWER CHOICES FIRST!! (small and easy = Work Backwards)
• Question wants a plug-in-able value (price) - good for working backwards

Start w/ B and D!

Question 6

Answer 6

OG DS 408 - A

TEST CASES

• use extremes to save you time on the math:

“less than $602… could be $0.01”
“less than $30… could be $0.01”

Question 7

Answer 7

OG PS 20

ANSWER CHOICES: spread out (estimate) and clean (work backwards)

Lots of ratio relationships and the number given is OUTPUT rather than INPUT.

Option 1: could work backwards (but that was a bit annoying here).

Option 2: YES! set up the ratios and then scale up!