Title: Good intro, bad study guide.
Product review: Full of errors, their math just doesn't, "add up." For example, a practice question on page 49 asks; what ar the common factors of 48 and 36? Their provided answer, "c. the common factors are 1,2,3,6, and 12. In addition to plain errors what I find most annoying is the sparse and at times absent explanation of the steps taken to arrive at a particular answer.
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