Enrolled Modules & Degree Pathway

3 Modules Active
Degree Pathway Presets:
Currently enrolled in: Mathematics 1, Physics, Mathematics 2

Question Accuracy % & Average Split-Time Pacing

Sub-90 Budget: 90s / Q
Overall Accuracy
—(0 / 0 Correct)
Across 3 enrolled ESAT modules
Average Split-Time
—/ 90s limit
No attempts logged
Pacing threshold: 90s per question
Active Modules
3of 5 Modules
Maths 1PhysicsMaths 2
Official ESAT sitting requires 3 modules
Exam Readiness
Ready for baseline assessment. Launch a diagnostic sprint.

Mathematics 1

13 Archetypes • 27 Questions per Mock

0 logged
Accuracy:No attempts yet
Average Split:
—/ 90s
Unattempted

Physics

15 Archetypes • 27 Questions per Mock

0 logged
Accuracy:No attempts yet
Average Split:
—/ 90s
Unattempted

Mathematics 2

15 Archetypes • 27 Questions per Mock

0 logged
Accuracy:No attempts yet
Average Split:
—/ 90s
Unattempted

Areas to Improve — Priority Topics & Common Traps

Priority Topics
ARCH-P-12PhysicsP7
17.2% Exam Weight • Unattempted

Nuclear Decay Chains (α, β⁻, γ), Isotope Algebra & Background-Corrected Half-Life Calculus

Sub-90 Shortcut: Decay chain 2-step rule: (1) Mass number A only changes via alpha: N_alpha = (A_start - A_end)/4. (2) Proton number: N_beta = Z_end - (Z_start - 2*N_alpha). For count rates: Net = Raw - Background.
ARCH-P-11PhysicsP6
15.0% Exam Weight • Unattempted

Wave Equation (v = fλ), Refraction Invariance, Pulse-Echo Sonar (d = ½vt), Relative Waves & Redshift

Sub-90 Shortcut: Refraction invariant: frequency f NEVER changes across a boundary (v1/λ1 = v2/λ2). For echo/ultrasound, halve time (t/2) immediately; for a particle on a transverse wave, distance per cycle = 4 * Amplitude.
ARCH-M1-07Mathematics 1M4
13.8% Exam Weight • Unattempted

Algebraic Subject Rearrangement, Rational Fractions & Completing the Square

Sub-90 Shortcut: For y = (ax+b)/(cx+d), the inverse rearrangement swaps (a, d) with a sign flip: x = (-dy+b)/(cy-a). For p(x+q)²+r, evaluate at x=0 and x=-q to find r in 10 seconds without full expansion.
Common Exam Traps
#1 Trap23.8% of historical foils
High-Yield Foil

Fence-Post, Boundary & Domain Exclusion Trap

Examiners engineer options that include extraneous roots where a denominator vanishes, log arguments turn non-positive, or endpoint counts miss +1 in discrete intervals.
Sub-90 Dry-Wipe Habit:
Write DOM: x>k,  xeqr\text{DOM: } x > k,\; x eq r BEFORE squaring or clearing fractions.
Taxonomy ID: fence_post_or_domain_trapPractice in Common Traps
#2 Trap21.3% of historical foils
High-Yield Foil

Sign, Vector Direction & Inequality Flip Trap

Every UAT-UK numerical question pairs the true magnitude with its opposite sign or reciprocal ratio—catching vector momentum rebounds, exothermic ΔH signs, and negative log bases.
Sub-90 Dry-Wipe Habit:
Draw ⟶(+)\longrightarrow (+) at the top of Line 1; circle negative bases or upward vs. downward vectors.
Taxonomy ID: sign_or_direction_flipPractice in Common Traps
#3 Trap19.1% of historical foils
High-Yield Foil

Factor-of-2, Diameter/Radius & Stoichiometric Ratio Trap

Options are spaced by exact factors of 2, 4, or stoichiometric mole ratios to catch diameter-vs-radius slips ($A = \pi d^2/4$), triangle $1/2$ omissions, and diprotic acid ratios.
Sub-90 Dry-Wipe Habit:
If diameter d→kd \to k, area scales as k2k^2, volume as k3k^3; never plug dd into πr2\pi r^2.
Taxonomy ID: factor_of_two_or_stoichiometry_trapPractice in Common Traps
Study Community & Classroom Tools

Invite Your Teacher & Study Partners

Connect your school teacher to track class-wide 90s telemetry or invite study partners to compare mock scores

Classroom Free • Teacher Tools

Invite Your Teacher

Your teachers can create a class, set auto-marked homework from the 75 archetypes, and monitor class-wide 90s split-time pacing and weak areas.

  • Auto-marked assignments from 75 ESAT topics & timed mocks
  • Classroom-wide 90-second pacing & accuracy telemetry
  • 1-Click Google Classroom & Microsoft Teams sync
https://sub90esat.com/teacher?ref=student-invite
Preview Teacher Platform
Study Group • Referral

Invite Friends

Studying with friends sharpens 90-second exam pacing. Compare mock accuracy, challenge classmates in the Speed Dojo, and spot distractor traps together.

  • Compare mock accuracy & 90s split times
  • Challenge friends in the Sub-90 Speed Dojo
  • Instant 1-click access — no barrier to entry
https://sub90esat.com/?ref=study-partner

All 75 Exam Topics

Explore all 75 archetypes across all 5 modules

Showing 15 of 15 archetypes
Most Common Exam Topics (Physics)

Mastering just the Top 5 Topics in Physics covers 55.4% of all historical exam questions (129 past questions)

Practice #1 Most Common Topic (ARCH-P-12)
ARCH-P-01P1
9.87% Exam Share
23 Past Questions

Series-Parallel Resistor Networks, Potential Dividers & Variable Sensor Meter Tables

Physics • Official Topic: Electricity

Table-Row Match145s Trap→40s TargetSaves 105s
2-Line Dry-Wipe Heuristic:
Use the product-over-sum shortcut R_p = (R1*R2)/(R1+R2) (and R/n for n identical parallel resistors). In meter trend tables, take the extreme limit R_var -> infinity (open circuit) to read ammeter/voltmeter changes in 5 seconds.
4 Engineered Examiner Distractor Traps:
  • [intermediate_stop_trap] Forgetting to invert 1/R_p = 1/R₁ + 1/R₂, adding 1/R_p directly to R_series
    Using conductance 1/R_p instead of resistance R_p = (R₁*R₂)/(R₁+R₂).
  • [sign_or_direction_flip] Assuming voltmeter across variable resistor R_var decreases when R_var increases
    Confusing current decrease (I drops) with potential divider share V_var = V_in * R_var/(R_fixed + R_var) (which rises).
  • [table_column_pruning_trap] Evaluating complex branch voltages before checking total circuit current ammeter column first
    Failing to prune 50% of table rows immediately via total resistance -> main ammeter trend.
  • [subsystem_isolation_trap] Applying V = IR using total battery EMF for a single resistor in a series divider
    Using whole-circuit voltage instead of component potential difference.
ARCH-P-02P1
4.72% Exam Share
11 Past Questions

Electrical Power Dissipation (P = IV = I^2R = V^2/R), Grid Efficiency & Energy (E = VIt)

Physics • Official Topic: Electricity

Standard 5-Option140s Trap→40s TargetSaves 100s
ARCH-P-03P2FREE SAMPLE
3.86% Exam Share
9 Past Questions

Magnetic Flux Patterns & Motor Effect Force on Current-Carrying Conductors (F = BIL)

Physics • Official Topic: Magnetism

Standard 5-Option135s Trap→35s TargetSaves 100s
ARCH-P-04P3
5.15% Exam Share
12 Past Questions

1D Multi-Stage Kinematics (v–t Graph Areas/Gradients) & Constant-Acceleration SUVAT

Physics • Official Topic: Mechanics

Standard 5-Option145s Trap→40s TargetSaves 105s
ARCH-P-05P3
4.72% Exam Share
11 Past Questions

1D Coupled Multi-Body Resultant Force (F_net = ma), Lifts & Internal Tension

Physics • Official Topic: Mechanics

Standard 5-Option150s Trap→40s TargetSaves 110s
ARCH-P-06P3
6.01% Exam Share
14 Past Questions

Equilibrium of Coplanar Forces, Drag/Terminal Velocity Balancing & Tension-Spring/Pulley Systems

Physics • Official Topic: Mechanics

Standard 5-Option140s Trap→35s TargetSaves 105s
ARCH-P-07P3
2.15% Exam Share
5 Past Questions

Hooke's Law, Springs in Series (½k) vs. Parallel (2k) & Elastic Potential Energy (½kx^2)

Physics • Official Topic: Mechanics

Standard 5-Option140s Trap→35s TargetSaves 105s
ARCH-P-08P3FREE SAMPLE
4.29% Exam Share
10 Past Questions

1D Momentum Conservation, Vector Rebound Impulse (FΔt = Δp) & Collisions

Physics • Official Topic: Mechanics

Standard 5-Option135s Trap→35s TargetSaves 100s
ARCH-P-09P3
7.3% Exam Share
17 Past Questions

Work-Energy-Power Conservation (ΔE_p = mgΔh, E_k = ½mv^2) & Resistive Drag Work

Physics • Official Topic: Mechanics

Standard 5-Option140s Trap→40s TargetSaves 100s
ARCH-P-10P4
4.72% Exam Share
11 Past Questions

Specific Heat Capacity (Q = mcΔT), Latent Heat (Q = mL) & Electrical Heating Curves (Pt = mcΔT)

Physics • Official Topic: Thermal physics

Standard 5-Option140s Trap→40s TargetSaves 100s
ARCH-P-11P6
15.02% Exam Share
35 Past Questions

Wave Equation (v = fλ), Refraction Invariance, Pulse-Echo Sonar (d = ½vt), Relative Waves & Redshift

Physics • Official Topic: Waves

Standard 5-Option130s Trap→35s TargetSaves 95s
ARCH-P-12P7
17.17% Exam Share
40 Past Questions

Nuclear Decay Chains (α, β⁻, γ), Isotope Algebra & Background-Corrected Half-Life Calculus

Physics • Official Topic: Radioactivity

Standard 5-Option130s Trap→30s TargetSaves 100s
ARCH-P-13P2FREE SAMPLE
3.43% Exam Share
8 Past Questions

Electromagnetic Induction (Faraday/Lenz Coil Graphs), AC Generators & Transformer Scaling (V_p/V_s = N_p/N_s)

Physics • Official Topic: Magnetism

Standard 5-Option140s Trap→35s TargetSaves 105s
ARCH-P-14P5
6.01% Exam Share
14 Past Questions

Hydrostatic Fluid Pressure (P = ρgh), Archimedes Upthrust, Composite Density & Ideal Gas Pistons (P_1V_1 = P_2V_2)

Physics • Official Topic: Matter

Standard 5-Option145s Trap→40s TargetSaves 105s
ARCH-P-15P4
5.58% Exam Share
13 Past Questions

Thermal Conduction Rod Scaling (Q̇ ∝ AΔT/L), Convection Density Currents & Radiative Power (P ∝ R^2 T^4)

Physics • Official Topic: Thermal physics

Standard 5-Option135s Trap→35s TargetSaves 100s