Rapid Math Tricks and Tips 30 Days to Number Power

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· 76 ratings · 6 reviews

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Feb 17, 2012 Rolf William rated it it was amazing

This book is great if you want to learn how to do arithmetic in your head quickly.
Why would you want to do this? Because every phone interview with a hedge fund or trading firm starts out by asking you to do a bunch of arithmetic in your head quickly. Plus, it's nice to be mathematically competitive with 9 year olds in India.
This book is great if you want to learn how to do arithmetic in your head quickly.
Why would you want to do this? Because every phone interview with a hedge fund or trading firm starts out by asking you to do a bunch of arithmetic in your head quickly. Plus, it's nice to be mathematically competitive with 9 year olds in India.
...more

This book is fun, but ultimately useless. You have to practise these tricks frequently in order to put them into long-term memory, and then when are you going to use them? Perhaps I should put that into the 1st person singular . . . I could learn these, and was having fun working through them all, but then thought about the likelihood of ever using them and decided that was about zero percent. I'm already good at simple mental arithmetic, good at estimating, and excellent with pen and paper, so This book is fun, but ultimately useless. You have to practise these tricks frequently in order to put them into long-term memory, and then when are you going to use them? Perhaps I should put that into the 1st person singular . . . I could learn these, and was having fun working through them all, but then thought about the likelihood of ever using them and decided that was about zero percent. I'm already good at simple mental arithmetic, good at estimating, and excellent with pen and paper, so for the limited amount of calculating that I need to do I have more than adequate skills already.
Still, a fun book for anyone who likes playing with numbers. ...more

Nov 21, 2015 Clint rated it really liked it

Lots of helpful techniques in this book. Even though you'll never remember every tip and trick, you nevertheless increase your capacity to conduct mental calculations. I really enjoyed this book's fast pace and high volume of exercises, which forced me to handle and think about numbers with a level of intuition that I had never had before. Lots of helpful techniques in this book. Even though you'll never remember every tip and trick, you nevertheless increase your capacity to conduct mental calculations. I really enjoyed this book's fast pace and high volume of exercises, which forced me to handle and think about numbers with a level of intuition that I had never had before. ...more

Jan 12, 2014 Matt rated it it was amazing

So glad to have this book on my shelf. I'll have to keep refreshing these tricks, but a few are easy to remember. So glad to have this book on my shelf. I'll have to keep refreshing these tricks, but a few are easy to remember. ...more