Math tricks,puzzles Books

Following Rar file contains two files

Secrets of Mental Maths

Description:

This book is related to Math calculations how to calculte math problems easy how to make tricks to solve problems with  mind without using calculator 

 
for example : 69*11 multiplication with mind in 3 second  .

Math Tricks,Twists,Puzzles

Description:

This books is about mathematics puzzles tricks twists solve some IQ problems

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