200+ Free OAR Practice Questions

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Question 1

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A ship stores 180 bottles of water for 12 sailors on a short training trip. If each sailor receives the same number of bottles, how many bottles does each sailor get?

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2026 Statistics

Key Facts: OAR Exam

Subtests

MST, RCT, MCT

1-2 hrs

Official OAR Time

APEX FAQ range

Free

Exam Cost

No official fee

Attempt Limit

Current ASTB-E/OAR guidance

42-50+

Current Min Examples

2025 MyNavyHR PAs

APEX

Delivery Format

Computer-adaptive

The OAR is the MST/RCT/MCT portion of the ASTB-E and is delivered in APEX computer-adaptive format. Navy Medicine's current FAQ says the OAR takes about 1-2 hours, has no fee, and uses program-specific minimums rather than one universal cutoff. Current 2025 MyNavyHR program authorizations show example minimums of 42 for SWO/Supply, 45 for Civil Engineer Corps, and 50 for Intelligence. Navy Medicine does not publish fixed official section percentages, so the practice mix here follows common OAR prep emphasis rather than an official weighting chart.

Sample OAR Practice Questions

Try these sample questions to test your OAR exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1A ship stores 180 bottles of water for 12 sailors on a short training trip. If each sailor receives the same number of bottles, how many bottles does each sailor get?

A.12

B.15

C.18

D.20

Explanation: The total is shared equally, so compute 180 divided by 12 to get 15. Equal-share word problems use division because one total is being split into equal parts.

2A candidate drives 150 miles to a testing center in 3 hours. What was the candidate's average speed?

A.45 mph

B.50 mph

C.55 mph

D.60 mph

Explanation: Average speed equals distance divided by time. Dividing 150 miles by 3 hours gives 50 miles per hour.

3Solve for x: 4x - 7 = 21

A.6

B.7

C.8

D.9

Explanation: Add 7 to both sides first to get 4x = 28. Then divide by 4, which gives x = 7.

4A rectangular storage room is 8 feet long and 5 feet wide. What is its area?

A.13 square feet

B.26 square feet

C.40 square feet

D.80 square feet

Explanation: The area of a rectangle is length times width. Multiplying 8 by 5 gives 40 square feet.

5What is the mean of the numbers 42, 48, 50, 50, and 60?

A.48

B.50

C.52

D.54

Explanation: Add the numbers to get 250, then divide by the 5 values. The mean is 250 divided by 5, which equals 50.

6A supply list shows that 25% of 200 items are batteries. How many batteries are on the list?

A.25

B.40

C.50

D.75

Explanation: Twenty-five percent is the same as one-fourth. Dividing 200 by 4 gives 50, so 25% of 200 is 50. Converting a common percent to a fraction is often the fastest way to solve basic OAR percentage questions.

7The sum of two consecutive integers is 47. What is the larger integer?

A.23

B.24

C.25

D.47

Explanation: Let the integers be n and n + 1. Then n + (n + 1) = 47, so 2n + 1 = 47, which gives n = 23 and the larger integer 24.

8One printer can produce 180 forms in 6 minutes at a constant rate. At that same rate, how many forms can it produce in 15 minutes?

A.360

B.420

C.450

D.540

Explanation: The printer's rate is 180 divided by 6, or 30 forms per minute. In 15 minutes it produces 30 times 15, which equals 450 forms.

9A circle has a diameter of 10 inches. Using pi approximately 3.14, what is its circumference?

A.15.7 inches

B.31.4 inches

C.50 inches

D.78.5 inches

Explanation: Circumference is pi times diameter. Using 3.14 times 10 gives 31.4 inches.

10A candidate's five practice scores are 72, 68, 84, 76, and 90. What is the median score?

A.72

B.76

C.78

D.84

Explanation: Order the scores from least to greatest: 68, 72, 76, 84, 90. The middle value in the ordered list is 76, so that is the median.

About the OAR Exam

The Officer Aptitude Rating (OAR) is the Navy's non-aviation officer aptitude exam used for many Officer Candidate School and staff community applications. It measures quantitative reasoning, reading comprehension, and mechanical understanding through the Math Skills Test, Reading Comprehension Test, and Mechanical Comprehension Test.

Questions

80 scored questions

Time Limit

1-2 hours

Passing Score

No universal passing score

Exam Fee

Free (Navy Medicine Operational Training Command / Naval Aerospace Medical Institute)

OAR Exam Content Outline

~40% practice emphasis

Math Skills Test (MST)

Arithmetic, algebra, geometry, and data-analysis word problems solved without a calculator.

~25% practice emphasis

Reading Comprehension Test (RCT)

Extracting details, identifying main ideas, and drawing inferences strictly from short passages.

~35% practice emphasis

Mechanical Comprehension Test (MCT)

Introductory physics concepts including force and motion, fluids and pressure, electricity, engines, gears, pulleys, and levers.

How to Pass the OAR Exam

What You Need to Know

Passing score: No universal passing score
Exam length: 80 questions
Time limit: 1-2 hours
Exam fee: Free

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

OAR Study Tips from Top Performers

1Prioritize arithmetic and algebra speed first because weak setup errors sink otherwise easy MST questions.

2Practice reading questions by proving every answer directly from the passage, not from outside knowledge.

3Memorize the core mechanical relationships tested most often: torque, gear ratio, leverage, pressure, voltage, current, and mechanical advantage.

4Work without a calculator every time so your pacing matches test-day conditions.

5Run mixed timed sets after content review because the real OAR shifts quickly between math, reading, and mechanical reasoning demands.

Frequently Asked Questions

What is on the OAR?

The OAR consists of three subtests: Math Skills Test (MST), Reading Comprehension Test (RCT), and Mechanical Comprehension Test (MCT). It is the non-aviation portion of the broader ASTB-E and is commonly used for Navy OCS and staff corps applications.

What OAR score do I need?

There is no single official passing score for every Navy program. Navy Medicine says minimums differ by program and service, and current MyNavyHR program authorizations show examples such as 42 for Surface Warfare and Supply, 45 for Civil Engineer Corps, and 50 for Intelligence. In practice, many applicants aim for the mid-40s or better to stay competitive.

How many questions are on the OAR and how long does it take?

The official APEX version is computer-adaptive, so Navy Medicine does not publish one fixed item count for every examinee. For planning purposes, many prep sources still describe the OAR as roughly an 80-question exam, but the official FAQ is clearer on timing than count: expect about 1-2 hours total.

Can I retake the OAR?

Current Navy Medicine guidance states that candidates are limited to three attempts on the current OAR/ASTB-E series and that at least 30 full calendar days must elapse before a retest. Because policy details can be updated administratively, confirm your current eligibility window with your recruiter before scheduling.

Can I use a calculator on the OAR?

No. The official ASTB FAQ says calculators are not allowed. You are given scratch paper, and the test is designed to be completed with mental math plus the formulas provided.