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

Sep 2, 2026

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 DAT and OAT Preparation for Free | Official Resources from Dr. Jim Romano

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DAT Destroyer

Dr. Romano and Nancy From New York

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Since 1999, we’ve helped over 100,000 students reach their goals with original, high-quality test prep resources. Every book, class, and guide we offer is crafted from scratch—never copied—ensuring you're getting content designed with your success in mind.

Meet Dr. Jim Romano
Dr. Romano holds advanced degrees in Organic Chemistry and Dental Surgery from the University of Miami and NYU. He studied under some of the most respected chemists in the world, including Drs. Mills, Hare, Eschegoyen, Schultz, Oratz, and Bartolotti, gaining deep expertise in chemistry, physics, and biochemistry.

Though trained as an oral surgeon, Dr. Romano found his true passion in education. For over 25 years, he has dedicated himself to mentoring future dentists and optometrists—helping thousands master the DAT and OAT and gain admission to top schools.

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

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