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  1. DAT Destroyer

    Labor Day DAT and OAT Destroyer Book Giveaway | Dr. Jim Romano

    🎉 LABOR DAY GIVEAWAY! We’re giving away one 2026 Destroyer book of your choice with free shipping to the U.S. or Canada! HOW TO ENTER: Visit our official Instagram giveaway post: Follow @orgomandatdestroyer Like the Instagram giveaway post Comment DAT or OAT and your planned test month on...
  2. DAT Destroyer

    DAT and OAT Math: Systems of Equations | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Here is a DAT and OAT Math practice problem from the Math Destroyer. Can you determine what fraction of the peptide’s amino acids are basic? Choose your answer before checking Dr. Romano’s solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your...
  3. DAT Destroyer

    DAT and OAT Math: Systems of Equations | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Here is a DAT and OAT Math practice problem from the Math Destroyer. Can you determine what fraction of the peptide’s amino acids are basic? Choose your answer before checking Dr. Romano’s solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your...
  4. DAT Destroyer

    DAT and OAT Math Mixture Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    DAT and OAT Math practice from DAT Destroyer. Can you determine how many pounds of blueberries are needed for the 56-pound mixture? Choose your answer before checking the second slide for the complete solution. Free DAT and OAT study resources: Official DAT Destroyer Resources | DAT Prep...
  5. DAT Destroyer

    DAT DAT and OAT Math Mixture Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    DAT and OAT Math practice from DAT Destroyer. Can you determine how many pounds of blueberries are needed for the 56-pound mixture? Choose your answer before checking the second slide for the complete solution. Free DAT and OAT study resources: Official DAT Destroyer Resources | DAT Prep...
  6. DAT Destroyer

    DAT and OAT Biology: Greatest Number of Sexes | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Here is a Biology question for students preparing for the DAT and OAT. The greatest number of sexes will be demonstrated in which of the organisms shown? Choose your answer before checking the second slide for Dr. Romano's explanation. Free DAT and OAT study resources from Dr. Jim Romano...
  7. DAT Destroyer

    DAT DAT and OAT Biology: Greatest Number of Sexes | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Here is a Biology question for students preparing for the DAT and OAT. The greatest number of sexes will be demonstrated in which of the organisms shown? Choose your answer before checking the second slide for Dr. Romano's explanation. Free DAT and OAT study resources from Dr. Jim Romano...
  8. DAT Destroyer

    Spring 2027 In-Person DAT and OAT Prep Class | Dr. Jim Romano | DAT Destroyer | OAT Destroyer

    Registration is now open for our Spring 2027 In-Person DAT and OAT Prep Class in Staten Island, NY. Dr. Jim Romano teaches 100% of every in-person class and has more than 35 years of experience preparing students for the DAT and OAT. Start Date: Sunday, January 17, 2027 End Date: Tuesday...
  9. DAT Destroyer

    DAT Spring 2027 In-Person DAT and OAT Prep Class | Dr. Jim Romano | DAT Destroyer | OAT Destroyer

    Registration is now open for our Spring 2027 In-Person DAT and OAT Prep Class in Staten Island, NY. Dr. Jim Romano teaches 100% of every in-person class and has more than 35 years of experience preparing students for the DAT and OAT. Start Date: Sunday, January 17, 2027 End Date: Tuesday...
  10. DAT Destroyer

    DAT and OAT Math Word Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you solve this pizza and calzone math word problem? Choose your answer before checking the solution on the second slide. The solution shows how to set up the equation step by step. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free |...
  11. DAT Destroyer

    DAT DAT and OAT Math Word Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you solve this pizza and calzone math word problem? Choose your answer before checking the solution on the second slide. The solution shows how to set up the equation step by step. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free |...
  12. DAT Destroyer

    DAT 🎥🎥VIDEO - DAT and OAT Organic Chemistry Functional Groups | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Functional groups are essential for DAT and OAT organic chemistry. Recognizing them quickly can help you identify compounds, predict reactions, and solve organic chemistry questions more efficiently. In this video, Dr. Jim Romano reviews important organic chemistry functional groups for the...
  13. DAT Destroyer

    VIDEO 🎥🎥DAT and OAT Organic Chemistry Functional Groups | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Functional groups are essential for DAT and OAT organic chemistry. Recognizing them quickly can help you identify compounds, predict reactions, and solve organic chemistry questions more efficiently. In this video, Dr. Jim Romano reviews important organic chemistry functional groups for the...
  14. DAT Destroyer

    DAT and OAT General Chemistry: Kinetic Isotope Effect | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you identify which isotopic pair would exhibit the greatest kinetic isotope effect? Choose your answer before checking the explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from...
  15. DAT Destroyer

    DAT DAT and OAT General Chemistry: Kinetic Isotope Effect | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you identify which isotopic pair would exhibit the greatest kinetic isotope effect? Choose your answer before checking the explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from...
  16. DAT Destroyer

    DAT and OAT Biology: Hashimoto’s Disease | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Test your DAT and OAT Biology knowledge with this question on Hashimoto’s disease. Choose your answer before checking the solution in the second image. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano
  17. DAT Destroyer

    DAT DAT and OAT Biology: Hashimoto’s Disease | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Test your DAT and OAT Biology knowledge with this question on Hashimoto’s disease. Choose your answer before checking the solution in the second image. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano
  18. DAT Destroyer

    DAT and OAT Biology: Sexual Dimorphism | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you identify the biology term that describes differences in appearance or behavior between males and females of the same species? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...
  19. DAT Destroyer

    DAT DAT and OAT Biology: Sexual Dimorphism | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you identify the biology term that describes differences in appearance or behavior between males and females of the same species? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...
  20. DAT Destroyer

    DAT and OAT Math: Daily Average Increase | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A medical laboratory wants to increase its daily average number of patients screened. Can you determine how many patients must be screened on the seventh day? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...
  21. DAT Destroyer

    DAT DAT and OAT Math: Daily Average Increase | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A medical laboratory wants to increase its daily average number of patients screened. Can you determine how many patients must be screened on the seventh day? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...
  22. DAT Destroyer

    DAT DAT and OAT Biology: Hemoglobin Quaternary Structure | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Hemoglobin carries oxygen from the lungs to tissues throughout the body. How well do you know the quaternary structure of normal adult human hemoglobin? Choose your answer before checking Dr. Romano’s explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...
  23. DAT Destroyer

    DAT and OAT Biology: Hemoglobin Quaternary Structure | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Hemoglobin carries oxygen from the lungs to tissues throughout the body. How well do you know the quaternary structure of normal adult human hemoglobin? Choose your answer before checking Dr. Romano’s explanation on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano...
  24. DAT Destroyer

    DAT and OAT Math Percentage Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A wood factory wants to increase its monthly production by 50%. Can you determine how many additional logs must be produced each workday? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...
  25. DAT Destroyer

    DAT DAT and OAT Math Percentage Problem | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A wood factory wants to increase its monthly production by 50%. Can you determine how many additional logs must be produced each workday? Choose your answer before checking the solution on the second slide. Free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT...
  26. DAT Destroyer

    VIDEO 🎥➡️ DAT and OAT Math Mixture Problems | Quantitative Reasoning with Dr. Jim Romano and Prof Blois

    Mixture and concentration problems are important topics for the DAT and OAT Quantitative Reasoning sections. In this video, Dr. Jim Romano demonstrates how to calculate percentages and concentrations when two different mixtures are combined or diluted. Watch the complete lesson: Free DAT...
  27. DAT Destroyer

    DAT VIDEO 🎥➡️DAT and OAT Math Mixture Problems | Quantitative Reasoning with Dr. Jim Romano and Prof Blois

    Mixture and concentration problems are important topics for the DAT and OAT Quantitative Reasoning sections. In this video, Dr. Jim Romano demonstrates how to calculate percentages and concentrations when two different mixtures are combined or diluted. Watch the complete lesson: Free DAT...
  28. DAT Destroyer

    DAT and OAT Biology: The Brain, Memory, and Dreams | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Which brain structure is most involved in pulling up and combining past memories to help create storylines? For more free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Choose your answer before...
  29. DAT Destroyer

    DAT DAT and OAT Biology: The Brain, Memory, and Dreams | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Which brain structure is most involved in pulling up and combining past memories to help create storylines? For more free DAT and OAT preparation resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano Choose your answer...
  30. DAT Destroyer

    DAT How to Build a Realistic DAT or OAT Study Schedule | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    I have worked with thousands of DAT and OAT students through the years, and one question I get asked over and over is: What study schedule should I follow? One of the biggest mistakes I see students make is trying to follow a study schedule created by someone else. No one else knows your...
  31. DAT Destroyer

    How to Build a Realistic DAT or OAT Study Schedule | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    I have worked with thousands of DAT and OAT students through the years, and one question I get asked over and over is: What study schedule should I follow? One of the biggest mistakes I see students make is trying to follow a study schedule created by someone else. No one else knows your...
  32. DAT Destroyer

    DAT and OAT Organic Chemistry: Benzylic Oxidation | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A compound with the molecular formula C8H10 is oxidized to benzoic acid using hot acidic dichromate. Which compound must it be? Work through the molecular formula and oxidation chemistry before checking the second image for Dr. Romano’s explanation. Free DAT and OAT study resources from Dr...
  33. DAT Destroyer

    DAT DAT and OAT Organic Chemistry: Benzylic Oxidation | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    A compound with the molecular formula C8H10 is oxidized to benzoic acid using hot acidic dichromate. Which compound must it be? Work through the molecular formula and oxidation chemistry before checking the second image for Dr. Romano’s explanation. Free DAT and OAT study resources from Dr...
  34. DAT Destroyer

    VIDEO 🎥🎥 DAT and OAT Organic Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Understanding when a reaction proceeds by SN1, SN2, E1, or E2 is essential for DAT and OAT Organic Chemistry. In this lesson, Dr. Jim Romano works through these reaction mechanisms and explains how to recognize the differences between substitution and elimination reactions. More free DAT and...
  35. DAT Destroyer

    DAT VIDEO 🎥 DAT and OAT Organic Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Understanding when a reaction proceeds by SN1, SN2, E1, or E2 is essential for DAT and OAT Organic Chemistry. In this lesson, Dr. Jim Romano works through these reaction mechanisms and explains how to recognize the differences between substitution and elimination reactions. More free DAT and...
  36. DAT Destroyer

    15% Off All Individual DAT and OAT Books | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    For a limited time, save 15% on all individual DAT and OAT study books from Dr. Jim Romano and the Destroyer team. Use code AUGUST15 at checkout on orgoman.com. Sale ends August 23. Individual books only. Bundles are excluded from this promotion because bundles are automatically discounted...
  37. DAT Destroyer

    DAT and OAT General Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano
  38. DAT Destroyer

    DAT DAT and OAT General Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano

    DAT and OAT General Chemistry | DAT Destroyer | OAT Destroyer | Dr. Jim Romano Can you solve this one? Check the second image for Dr. Romano’s solution. Free DAT and OAT study resources from Dr. Jim Romano: Start Your DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano...
  39. DAT Destroyer

    🎥VIDEO - DAT OAT Math: Mean, Median, Mode, Variance & Standard Deviation | DAT Destroyer | OAT Destroyer

    Review mean, median, mode, variance, and standard deviation for the DAT and OAT Quantitative Reasoning sections. This video works through basic statistics concepts and calculations that DAT and OAT students should understand for test day. Keep practicing and keep Destroying! Free DAT & OAT...
  40. DAT Destroyer

    DAT 🎥VIDEO - DAT OAT Math: Mean, Median, Mode, Variance & Standard Deviation | DAT Destroyer | OAT Destroyer

    Review mean, median, mode, variance, and standard deviation for the DAT and OAT Quantitative Reasoning sections. This video works through basic statistics concepts and calculations that DAT and OAT students should understand for test day. Free DAT & OAT preparation resources from Dr. Jim...