Having read lots of reviews of the available books on amazon for Numeracy QTS (many of which quoted incorrect answers and whole chunks missing!) I plumped for the re-published version of this book. I found it met my needs perfectly and by the looks of things the incorrect answers etc have been ironed out. What was great were the practise tests in each section, as there aren't many available online and so you can end up repeating them which, for someone like me who remembers answers, isn't great! This book gave me some very simple methods for speeding up my mental maths and I am pretty sure was instrumental in me passing! I would definitely recommend this over the other, perhaps more official, versions available.