DAT PAT common mistakes
DAT PAT · Understand the traps and how to avoid them.
In Perceptual Ability Keyhole (top-front-end) items, choosing the aperture that matches the object's overall silhouette from one view rather than the exact cross-section that would let the object pass through the keyhole.
Candidates default to visual similarity: the eye grabs the largest, most familiar outline and stops there. Because the object is drawn in isometric perspective, the true profile is foreshortened, and the tempting option is usually a scaled or mirrored version of the side view.
What to do instead
Before looking at the options, mentally project the object along each of the three axes and sketch the three orthographic outlines in the margins. Then test each aperture by asking whether every protrusion on the object clears the opening; eliminate any choice with a notch, bevel, or extra step that the object does not have. Practice by covering the answer choices until your own three sketches are done.
On Angle Ranking, ranking the angles by the length of their drawn sides or by how far apart the line endpoints sit on the page instead of by the actual degree of opening at the vertex.
Longer arms make an angle look larger, and the test deliberately pairs angles with mismatched arm lengths. Candidates also anchor on the first angle they see and adjust insufficiently from that anchor.
What to do instead
Use the 'slide and superimpose' method: mentally translate one angle onto another so the vertices and one arm coincide, and compare only the gap between the free arms. For close pairs, imagine extending both arms to equal length before judging. Rank the two easiest extremes first, then insert the ambiguous middle angles one at a time rather than ranking all four at once.
On Hole Punching, tracking only the number of holes and the fold count but not the reflection of each hole across every fold line, so the final pattern is off by one or more holes or has holes in mirrored positions.
Candidates try to hold the whole sequence in working memory and lose track after the second fold. The folds are shown as a sequence of quarter or half turns, and reversing the order of unfolding is unintuitive.
What to do instead
Unfold in reverse order, one fold at a time, and physically draw the reflected hole on scratch paper at each step. Reflect each hole across the crease line that was just unfolded, treating the crease as a mirror, and count holes as you go so the total matches the expected number (each fold roughly doubles the count). Verify by checking that the final pattern is symmetric about the first fold line.
On Cube Counting, counting only the visible top faces and forgetting that a stack's height implies hidden cubes beneath it, or forgetting that a cube resting on the floor has no painted bottom.
The drawing shows only exposed faces, and candidates count what they see rather than reconstructing the 3D block arrangement. Painted-face questions add a second layer of confusion because interior cubes are painted on fewer sides.
What to do instead
First reconstruct the full grid: for each column, write down its height, then total the cubes. For painted-face questions, classify cubes by position (corner, edge, face-center, interior) and count faces from that classification rather than from the picture. Do a quick sanity check that the number of cubes with exactly three painted faces equals the number of visible corners.
On Pattern Folding, choosing the folded cube or shape that shows the correct faces but in the wrong relative orientation, such as a face rotated 90 degrees or two faces adjacent that should be opposite.
Candidates verify that each symbol appears somewhere on the net but do not track adjacency and orientation through the folds. Symbols with a clear top and bottom, like arrows or letters, expose this error immediately.
What to do instead
Pick one distinctive face as an anchor, fold the net mentally around it, and track which edge of the anchor each neighboring face attaches to; opposite faces are those separated by exactly one face in a straight line of the net. For any option showing two symbols together, check that they are adjacent in the net and that the shared edge matches. Eliminate options with impossible adjacencies before worrying about orientation.
On Quantitative Reasoning, spending two or more minutes on a single multi-step word problem while leaving easier items at the end of the section unanswered.
The section is timed per item at roughly a minute or less, and the harder questions are not ordered last, so persistence on one problem silently consumes the budget for several easy ones. Candidates also re-derive formulas from scratch instead of using known shortcuts.
What to do instead
Adopt a strict per-item cap of about 90 seconds: if the setup is not clear, mark the item, pick a plausible answer, and move on. Do two passes, sweeping all quick arithmetic and ratio items first. Memorize the recurring tools (percent change, weighted averages, permutation versus combination, 30-60-90 and 45-45-90 ratios, circle and triangle area formulas) so no time is spent reconstructing them.
On Quantitative Reasoning, misreading what the question asks for, for example solving for the original price when the discounted price was requested, or reporting a probability as a count.
Word problems bury the target quantity in a long setup, and under time pressure candidates stop at the first number they compute. Unit mismatches (minutes versus hours, cents versus dollars) compound the error.
What to do instead
Before computing, write a one-line 'find:' statement naming the quantity and its units. After computing, reread the final sentence of the prompt and confirm the answer matches the requested quantity and unit. On probability and rate problems, label every intermediate value with its unit so a mismatch becomes visible.
On Reading Comprehension, answering from prior knowledge or personal opinion about the passage topic instead of from what the passage actually states, especially on inference and tone questions.
Science passages feel familiar, so candidates import outside facts. Tone and attitude questions also tempt strong words like 'condemns' or 'celebrates' when the author is merely descriptive.
What to do instead
For every answer, locate the specific sentence or phrase in the passage that supports it and reject any choice lacking textual support, even if it is true in the real world. For inference questions, accept only the minimal step beyond the text, not a leap. For tone, prefer moderate descriptors unless the passage uses clearly evaluative language, and check for signal words like 'unfortunately' or 'remarkably'.
In Survey of the Natural Sciences, memorizing isolated facts without a causal framework, so questions that ask for a mechanism, a prediction, or the effect of a perturbation cannot be answered.
The section spans biology, general and organic chemistry, and physics, and candidates often drill flashcard definitions because that feels productive. Exam items frequently present an unfamiliar scenario and require applying a principle rather than recalling a term.
What to do instead
Study each topic by writing the mechanism or cause-and-effect chain in your own words, then self-test with 'what happens if X is removed or doubled' questions. For organic chemistry, practice predicting products from functional groups and conditions rather than memorizing reaction lists. For physics, derive each formula once from its definitions so units and limiting cases become intuitive.
In Survey of the Natural Sciences, treating the four subjects as separate silos and skipping the weakest one entirely because it feels least familiar, leaving a disproportionate share of missed items concentrated in that subject.
Candidates gravitate to their strongest subject for a sense of progress, and the breadth of the section makes it easy to defer an uncomfortable topic indefinitely. Score reports often show a lopsided profile rather than uniform weakness.
What to do instead
Take one full-length diagnostic early and compute accuracy by subject and subtopic. Allocate study time inversely to accuracy, not to comfort, and set a minimum weekly block for the weakest subject. Recheck the breakdown every few weeks so improvement, not avoidance, drives the schedule.