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“Sumana Roy has written—grown—a radiant and wondrous book
fate brings together DJ Aspirin and ten-year-old Alyona
Albert Camus
” and “The Dead
Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks Fiction_Gift_Guide “Sumana Roy has written—grown—a radiantThese simple math secrets and tricks will forever change how you look at the world of numbers. Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friendsand yourselfwith incredible calculations you never thought you could master, as renowned mathemagician Arthur Benjamin shares his techniques for lightning quick calculations and amazing number tricks. This book will teach you to do math in your head
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