# Mathemagic

in #hive2 years ago (edited)

Hello Hivenas, hopefully you will be enjoying your life with good health and spirits. My friends @kamchore here with an other mathematics tricks. Image credit

My friends, let me tell you before applying this trick you should know the trick of multiplication of any number by 11. which i told you in my previous post. There is no need to re invent wheel. so, If you missed the post you may click here
Now In today's post I would give you the idea of quick division by 91 to any number with out the use of calculator. Amazed. No worry It is easy. Let's assume we have to divide 21 with 91.
Rule#1
Multiply 21 by 11
21 x 11 = 231 (From previous trick)
Subtract 1 from 231
231-1 = 230
Now Divide the answer by thousand 230/1000 = 0.23. Now pickup the calculator and check your answer.
Let's try another number 97

97 x 11 = 1067
1067-1 =1066
Divide by thousand
1.066
Let's select the number 91
91 x 11 = 1001
1001-1 = 1000
Divide 1,000 by 1,000 gives 1.00

Now Hopefully you will understand why we subtract 1 after multiplication with 11. The reason is simple. Don't hesitate to ask me if you don't understand. Wish you a very happy and blessed life ahead.