# Simple Arithmetic Puzzle 3. Or is it?

A third one (hopefully it's easier :)!

\begin{align}156+257&=-6\\752+651&=6\\103+482&=-19\\284+301&=31\\654+321&=21\\123+456&=\,?\end{align}

Can you find the value of the question mark?

Rule:

$abc+def= b \times c + a - e \times f - d$

$284 + 301 = 31$

$$8\times4 + 2 - 0\times1 - 3 = 31$$ Also, it works well for all the given equations.

Value of the question mark:

$-27$
As $2\times3 + 1 - 5\times6 - 4 = -27$

• How did you find out the pattern? – Manoj Kumar Jul 3 '18 at 0:44