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I have had the 1965 reprinting of this book and it is a prize to won. The concepts taught by Lester are illuminating and easyto grasp, and with practice can accelerate your math calculations and eliminate your need for paper and pencil or carrying digits. I recommend it to anyone who doesn't want to be calculator reliant, but does want to be calculator quick.
CHAPTER ITHERE IS A SHORTCUT FOR VIR
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