**1. Digital Root**

How to evaluate it --

a. Adding digits

eg. 2351068

Digital root is 2+3+5+1+0+6+8 = 25, 2+5=7

b. Casting Out nines

eg. 2351068

Cast out 3,6 ; 1,8 ; 0 (since their sum is 9) (Here

**9 ~ 0**)

Therefore digital root is 2+5 = 7

Use :

Used to verify addition , Subtraction and multiplication

Rule:

**.**

*Digital root is preserved during above operation*eg:

Addition

981723 + 54281 = 1036004

Digital root::

of 981723 is 3

of 54281 is 2

of 1036004 is 5 (which is 3+2, therefore our answer is correct)

Multiplication

213 X 121 = 25773

Digital root ::

of 213 is 6

of 121 is 4

of 25773 is 6

6X4=24 (whose digital root is 2+4=6 , which is same as that of 25773, therefore our answer is correct)

## 1 comment:

good ones, niketan. keep going and all the best for ur exams.

--

Ravi.

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