DAT Prep

DAT Quantitative Reasoning: The Formulas Students Forget

QR isn't about knowing advanced math, it's about having a short list of formulas instantly accessible under time pressure.

The Quantitative Reasoning section tests algebra, geometry, probability, statistics, and applied math, mostly concepts students already know from high school. The challenge is speed and recall under pressure, not difficulty.

Formulas that consistently trip students up

• Distance, rate, and time variations: especially problems combining multiple rates (two objects moving toward each other, or a round trip with different speeds each way).
• Probability of "at least one" events: students often forget to use 1 minus the probability of none happening, and instead try to calculate every individual case.
• Compound interest and exponential growth: the formula itself is simple, but recognizing when a word problem is describing exponential vs. linear growth is where students lose time.
• Similar triangles and proportional relationships: geometry questions disguised as algebra problems catch students who don't immediately recognize the shape relationship.

A better way to memorize than flashcards

Instead of memorizing formulas in isolation, work timed problem sets that force you to identify which formula applies before you can even start solving. Recognition speed matters more than the formula itself, most QR points are lost to hesitation, not lack of knowledge.

Speed drill approach

Set a timer for 10 minutes and do 10 QR problems pulled from mixed topics, not one category at a time. This mirrors the actual test far better than reviewing formulas by category, since the real DAT never tells you which formula a question needs.

Ready to test yourself? Check out our free DAT practice questions.