My ASVAB training booklet has an interesting basic question: I'm confused if the people that made this book over looked it or I am dumb.

10. A student finishes the first half of an exam in 2/3 the time it takes him to finish the second half. If the entire exam takes him an hour, how many minutes does he spend on the first half of the exam?

(A) 20

(B) 24

(C) 27

(D) 36

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2/3 of 60 mins is 40, so the answer is 40 mins for the first half.