DOST-SEI Quantitative Ability: Math Subtest Review Plan

DOST-SEI Quantitative Ability: Math Subtest Review Plan

The DOST-SEI Quantitative Ability subtest is one of two STEM-weighted blocks (with Scientific Ability) that determine whether you slot into the top 6,000 winners each cycle. The 50 items skew toward applied STEM word problems — more so than UPCAT Math. If your strength is computational fluency, this subtest rewards you. If your strength is verbal reasoning, you'll need to drill specifically.

This post is the topic-by-topic plan that the DOST-SEI 2026 pillar guide hands off to.

What DOST-SEI actually asks

Approximate item distribution across the 50 Quantitative items:

Negative marking: yes (typically -1/4 point per wrong answer). Five answer options instead of UPCAT's four. The extra distractor matters — pure 1-in-5 guessing is negative expected value after the deduction.

Algebra — the workhorse

Drill list:

• Linear equations in one and two variables, including word problems
• Quadratic equations: factoring, quadratic formula, discriminant, sum/product of roots
• Systems of equations (2×2 and 3×3 by elimination/substitution)
• Exponents and radicals: rules, simplification
• Polynomial operations and factoring (special products, grouping)
• Linear and quadratic inequalities, including absolute value
• Arithmetic and geometric sequences and series
• Functions: domain, range, composition, inverse, basic graph reading
• Logarithms and exponential equations

DOST-SEI's algebra word problems lean STEM-applied: rate problems involving chemical concentrations, mechanical systems, growth/decay, mixture problems with non-trivial setups. Drill 100+ word problems specifically.

Geometry

Drill list:

• Triangle properties: angle sums, exterior angle, similarity, congruence, special right triangles (30-60-90, 45-45-90)
• Circle theorems: inscribed angle, central angle, tangent-chord, arc length, sector area
• Polygon properties: interior/exterior angle sums, regular polygon area
• Coordinate geometry: distance, midpoint, slope, line equations, conics (circle and parabola)
• Area and volume of standard solids (prisms, cylinders, pyramids, cones, spheres)
• Pythagorean theorem and applications

The 30-60-90 and 45-45-90 ratios appear nearly every cycle. Memorise them cold.

Trigonometry

DOST-SEI trig is mostly right-triangle ratios and unit-circle values:

• SOH-CAH-TOA on right triangles
• Unit circle values for 0°, 30°, 45°, 60°, 90° and reflections
• Sine and cosine of complementary angles
• Pythagorean identity (sin²θ + cos²θ = 1)
• Law of sines and law of cosines on simple triangles
• Basic trig equations (one or two solutions per cycle)
• Angle of elevation/depression word problems

Skip the deep identities (sum-to-product). They almost never appear.

Statistics and probability

• Mean, median, mode, range, weighted average
• Reading bar charts, line graphs, pie charts, frequency tables
• Basic probability (single event, mutually exclusive, simple combinations)
• Basic counting (factorials, permutations, combinations on small n)

DOST-SEI's statistics block is descriptive only. No deep inference, no t-tests, no confidence intervals.

Pre-calculus / basic calculus

DOST-SEI includes 4-5 calculus items per cycle. Single concept asked at a single point:

• Limits at a point (algebraic substitution)
• Derivative as slope at a point on a polynomial
• Tangent line equation
• Sequence and series fundamentals

Don't go deep into integration or chain rule — they don't appear. The derivative-as-slope intuition is sufficient for most calculus items.

Number theory + applied arithmetic

• Divisibility rules
• Prime factorisation, GCD, LCM
• Percentages, ratios, proportions
• Mixture and work-rate problems
• Direct and inverse variation

This block is small (2 items) but high-yield per minute of preparation.

An 8-week Quantitative drilling plan

Within the broader 60-day DOST-SEI review, allocate 4 weeks of focused Quantitative attention plus 4 weeks of mixed mock + remediation.

The negative-marking math

DOST-SEI deducts 1/4 point per wrong answer with 5 answer options. Practical consequence:

• If you can eliminate 3 of 5 options, guess. Expected value is positive.
• If you can eliminate 2 of 5, guess only with a leaning toward one of the remaining three. Pure 1-in-3 is roughly break-even.
• If you can eliminate 1 of 5, guess only if you have strong intuition.
• If you can eliminate none, leave it blank.

Five blanks hurt less than five random fills. Build the discipline in mocks.

Realistic Quantitative scores

For a candidate running the 8-week Quantitative plan above:

Quantitative carries 25% of the total composite. A 78% (39/50) contributes 19.5 points to the 100-point composite — significant cushion.

Where Super Tutor fits

Super Tutor's DOST-SEI Quantitative track covers the topic distribution above with item drilling sequenced by topic. Free tier opens algebra and geometry; the Focused plan (₱49/week, ₱249/month, ₱1,999/year) opens trig, statistics, calculus, and the mock cycle.

What to read next

The DOST-SEI 2026 pillar guide anchors the full review. The Scientific Ability review covers the other STEM-weighted subtest.