Checking your calculate result - Vedic Maths

Checking your calculate result - Vedic Maths
Digital roots (D.R.) can be used to check answers, involving mathematical operations like addition, subtraction, multiplication, division, squaring, square roots, cube roots, etc... To verify our answers, we perform the same mathematical operation on the digital roots of the numbers as done in the problem, and the answer obtained should be equal to the digital root of the answer of the sum. If both do not match, then the answer is incorrect.
Digital Root: (D.R.)
Digital Root of a number is obtained by adding all the digits in a number, until we get a single digit. Digital Root of a number is always from 1 to 9 and never a 0.
Results:

Mathematical Operation	Method for checking the answer
Addition, a + b = c	D.R.(a) + D.R.(b) = D.R.(c)
Subtraction, a - b = c	D.R.(a) - D.R.(b) = D.R.(c)
Multiplication, a x b = c	D.R.(a) x D.R.(b) = D.R.(c)
Division, a (dividend) / b (divisor) = c (quotient) & d (remainder)	D.R.(c) x D.R.(b) + D.R.(d) = D.R.(a)
Squaring, a2 = b	D.R.[D.R.(a)]2 = D.R.(b)
Cubing, a3 = b	D.R.[D.R.(a)]3 = D.R.(b)

Example : 250 / 12 = 20 remainder 10
D.R.(20) = 2+0 = 2
D.R.(12) = 1+2 = 3
D.R.(10) = 1+0 = 1
2 × 3 + 1 = 7 --> A
D.R.(250) = 2+5+0 = 7 --> B
A and B are same. So our answer also correct.