I'm not sure which Barron's book you're talking about (idk if there's more than one), but I have the Barron's Officer Candidate School Tests book, and I have found multiple mistakes in the mathematics section. For example, practice test question #28 What is the average of the following group of numbers: 45.12, 55, 60.3, 92? (round to the nearest hundredth)
a) 35.30
b) 52.36
c) 59.55
d) 28.00
e) 35.90
Confused as to why the actual answer (63.11) is not an answer choice? Check the explanation in the answer key. They used different numbers than the one in the question (12.00 instead of 55) to arrive at answer choice b. This is just one of many mistakes in this obviously-not-proofread section. Thankfully, I didn't need help with averages haha. I'm not sure about the rest of the book yet, but I am not impressed thus far... The math section is where I need the most practice, I'm so rusty! :icon_rage Maybe the other sections are good? I'll give it the benefit of the doubt for now, but be careful with it.