Math Skills
40%of exam
Reading Comprehension
25%of exam
Main IdeaDetailsInferenceToneEvidence
Mechanical Comprehension
35%of exam
ForcesMachinesFluidsElectricityMotion
Quick Facts
- Exam
- OAR
- Full name
- Officer Aptitude Rating
- Parent test
- ASTB-E
- Delivery
- APEX adaptive
- Time
- 1-2 hours
- Cost
- No fee
- Calculator
- Not allowed
- Score rule
- Most recent counts
OAR Subtests
Math reads machines
MST: mathRCT: readingMCT: mechanical
OAR vs ASTB-E
OAR
- MST/RCT/MCT
- One score
- Non-aviation option
ASTB-E
- Full battery
- Aviation scores
- PBM included
Officer vs aviation
Math Picker
- Equal shares→Division(Total ÷ groups)
- Percent of→Fraction(Convert first)
- Unknown number→Equation(Let x)
- Two rates→Proportion(Cross multiply)
- Middle value→Median(Order first)
- Average asked→Mean(Sum ÷ count)
- Right triangle→Pythagorean(Hypotenuse last)
- Circle boundary→Circumference(pi d)
OAR Facts
- MST
- Math Skills Test
- RCT
- Reading Comprehension Test
- MCT
- Mechanical Comprehension Test
- APEX
- Adaptive Navy system
- CAT
- Adaptive item path
- OAR only
- Non-aviation route
- Full ASTB-E
- Aviation route
- Score record
- Newest attempt counts
No Calculator
Estimate, simplify, then solve
Cancel firstUse fractionsRound wisely
Speed vs Accuracy
Speed
- Brisk pacing
- Avoid stalls
- Finish enough
Accuracy
- No blind guessing
- Clean setup
- Check units
Fast but deliberate
Adaptive Rules
- Correct streak
- Harder items follow
- Missed item
- Easier items follow
- No backtracking
- Answers are final
- No skipping
- Commit each item
- Unanswered
- May trigger penalty
- Random guessing
- Avoid late panic
- Early items
- Set ability estimate
- Hard questions
- Often positive signal
Arithmetic
- Mean
- Sum ÷ count
- Median
- Middle ordered value
- Mode
- Most frequent value
- Range
- High minus low
- Percent
- Part over whole
- Rate
- Distance ÷ time
- Ratio
- Same-unit comparison
- Proportion
- Equal ratios
Algebra + Geometry
- Linear equation
- Isolate variable
- Consecutive
- n, n+1
- Area rectangle
- Length × width
- Triangle area
- Half base height
- Circle area
- pi r squared
- Circumference
- pi × diameter
- Pythagorean
- a2+b2=c2
- Slope
- Rise over run
Reading Evidence
Text first, memory last
Find lineCheck scopeReject outside
Main Idea vs Detail
Main idea
- Whole passage
- Central claim
- Broad enough
Detail
- One fact
- Line support
- Narrow scope
Whole vs part
Reading Picker
- Whole passage→Main idea(Not detail)
- Line reference→Detail(Quote nearby)
- Must infer→Inference(Stay textual)
- Author feeling→Tone(Check adjectives)
- Word meaning→Context(Read sentence)
- Except appears→Reverse(Find false)
- Extreme answer→Eliminate(Check scope)
- Two good choices→Best support(Stronger evidence)
Reading Targets
- Main idea
- Whole passage claim
- Detail
- Explicit text support
- Inference
- Text-based conclusion
- Tone
- Author attitude
- Purpose
- Why author wrote
- Structure
- How passage unfolds
- Context word
- Meaning from sentence
- Best answer
- Most supported choice
Inference vs Assumption
Inference
- Text supported
- Modest conclusion
- Evidence based
Assumption
- Outside knowledge
- Too strong
- Unproved leap
Supported vs imported
Reading Signals
- However
- Contrast ahead
- Therefore
- Conclusion ahead
- For example
- Support follows
- Because
- Reason follows
- Although
- Concession ahead
- Always
- Extreme clue
- Most
- Qualified scope
- Except
- Reverse task
Mechanical Core
Force, flow, current, torque
F=maP=F/AV=IRT=F×d
Force vs Pressure
Force
- Push or pull
- Measured newtons
- Causes acceleration
Pressure
- Force per area
- Fluid key
- Area matters
Total vs spread
Mechanical Picker
- Acceleration asked→F=ma(Net force)
- Turning effect→Torque(Force × arm)
- Lifted load→MA(Count supports)
- Gear speed→Teeth ratio(Small faster)
- Fluid force→Pressure(P=F/A)
- Circuit current→Ohm law(I=V/R)
- Sinking question→Density(Compare fluid)
- Work rate→Power(W/t)
Forces + Motion
- Force
- Mass × acceleration
- Weight
- Mass × gravity
- Work
- Force × distance
- Power
- Work ÷ time
- Momentum
- Mass × velocity
- Kinetic energy
- Depends on v2
- Friction
- Opposes motion
- Torque
- Force × arm
Series vs Parallel
Series
- One path
- Resistance adds
- Same current
Parallel
- Many paths
- Lower total
- Same voltage
Path count decides
Simple Machines
- Lever
- Turns about fulcrum
- Pulley
- Rope changes force
- Wheel axle
- Radius trades force
- Incline
- Longer path helps
- Wedge
- Splits by incline
- Screw
- Incline wrapped around
- Gear train
- Teeth transfer motion
- Mechanical advantage
- Output over input
Fluids + Electricity
- Pressure
- Force ÷ area
- Hydraulics
- Pressure transmits force
- Buoyancy
- Upward fluid force
- Density
- Mass ÷ volume
- Bernoulli
- Faster flow lowers pressure
- Voltage
- Electrical push
- Current
- Charge flow
- Resistance
- Opposes current
- Ohm law
- V = I R
- Series
- One current path
- Parallel
- Multiple current paths
Common Traps
OAR vs full battery
OAR is three subtests ≠ ASTB-E adds aviation
Old score vs new score
Newest score counts ≠ Higher old score replaced
Inference vs memory
Inference uses text ≠ Memory imports facts
Area vs perimeter
Area multiplies dimensions ≠ Perimeter adds sides
Force vs pressure
Force is total ≠ Pressure includes area
Gear size vs speed
Small gear faster ≠ Meshed gears reverse
Last Minute
- 1.OAR = MST/RCT/MCT
- 2.APEX means adaptive
- 3.No calculator allowed
- 4.Newest score counts
- 5.Aviation needs full ASTB-E
- 6.Main idea covers all
- 7.Inference needs text proof
- 8.F=ma; V=IR
- 9.Small gears spin faster
- 10.Series one path; parallel many
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