This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- That combined average, weighted mean, and mixture problems all follow the same principle: never average the averages.

- How to set up weighted average calculations by multiplying each value by its respective weight before summing and dividing by the total weight.

- The correct method for setting up mixture problems by creating an equation that balances the concentration and quantity of the components with the final mixture's properties.

- To recognize the common exam trap of simply averaging percentages or scores without accounting for different quantities or weights.

- To apply the 'Total Value' shortcut by tracking both the total quantity and the total weighted value to simplify complex problems, including replacement scenarios.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- How to calculate an individual's work rate as the reciprocal of the time taken (Rate = 1/Time).

- Why you must always add individual work rates, not the times, to find the combined production rate.

- The correct formula for solving combined work problems: (1/T1) + (1/T2) = 1/T_total.

- How to handle problems with opposing forces, like filling and draining, by subtracting the negative rate.

- The 'Flip 'em, Add 'em, Flip 'em back' mnemonic to quickly solve these questions on the exam.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- How to correctly set up and solve proportions using cross-multiplication for OAR-style word problems.

- The critical difference between direct and inverse proportions, a common exam trap.

- Techniques for solving scaling problems related to maps and technical drawings.

- The importance of converting to consistent units before calculating ratios to avoid simple errors.

- A mental shortcut, "More hands, less time," to quickly identify and solve inverse relationship problems.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- How to quickly convert between decimals, fractions, and percentages by moving the decimal point.

- The method for solving reverse-percent problems to find the original amount after a change.

- How to calculate markups and discounts by multiplying the original value by (1 + percent) or (1 - percent).

- The critical difference between a percentage point change and a percent change to avoid common exam traps.

- To apply the "New minus Old, over Old" formula for any percent increase or decrease question.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- To master PEMDAS, you must apply the left-to-right rule for multiplication/division and addition/subtraction pairs.

- When adding or subtracting fractions, always find the least common denominator first; for division, remember to invert and multiply the second fraction.

- A double negative becomes a positive, such as in the expression -7 - (-10), which simplifies to -7 + 10.

- Use estimation as a mental check to quickly eliminate incorrect answer choices, especially with fraction and decimal problems.

- Since the OAR Math Skills Test is adaptive and calculator-prohibited, accuracy on fundamental arithmetic is crucial for achieving a competitive score.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- The OAR is a computer-adaptive test, meaning you cannot skip questions or return to change your answers.

- Personal calculators and all electronic devices are strictly prohibited; all math must be performed by hand on provided scratch paper.

- Your test-day pacing strategy should focus on accuracy, as random guessing at the end of a section can significantly harm your score more than leaving questions unanswered.

- Arriving on test day requires a valid, unexpired government-issued photo ID for check-in.

- The difficulty of each question you face adjusts based on your previous answer, which is a core component of the scoring algorithm.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- The Navy OAR uses your most recent score as the official score of record, even if it's lower than a previous attempt.

- A lower score on a retake permanently replaces any higher, earlier scores.

- Candidates are limited to a total of three lifetime attempts on the current OAR and ASTB-E test series.

- There is a mandatory 31-day waiting period after the first attempt and a 91-day waiting period after the second.

- You must always verify the current retest policies with an official Navy Officer Recruiter before deciding to retake the exam.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- The OAR score is a composite score on a 20-80 scale, reported immediately after the test.

- There is no single universal "passing" OAR score; each Navy officer community sets its own minimum.

- Minimum scores vary significantly, with communities like Intelligence often requiring higher scores than others like Surface Warfare or Supply.

- The official minimum requirements are published in a document called the Program Authorization (PA) for each specific officer designator.

- Why you must consult your officer recruiter for the most current PA to avoid relying on outdated information and to set an accurate target score.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- That the OAR is a component of the larger ASTB-E, consisting of its first three subtests.

- Which specific officer communities require an OAR score versus the full ASTB-E.

- The names and purposes of the four additional subtests required for aviation applicants.

- Why confirming the correct test with a recruiter is a critical step that prevents wasting a test attempt.

- The difference between the OAR's 20-to-80 point score and the ASTB-E's 1-to-9 stanine scores.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.

In this episode you will learn:

- The OAR is a subset of the ASTB-E, consisting of the Math, Reading, and Mechanical Comprehension sections, not a separate test.

- OAR scores are critical for non-aviation officer programs such as Surface Warfare, Intelligence, Supply Corps, and others.

- The difference between a program's minimum required OAR score and a truly competitive score for selection.

- How the OAR's single score for officer screening differs from the ASVAB's multiple line scores for enlisted job placement.

- The importance of verifying current OAR requirements with a recruiter, as they vary by community and change over time.

For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep