Question

Complete the magic square.

Answer 1

The Concept of Solving a Magic Square is that the sum of all numbers in each $row,column$ and $diagonal$ are $equal$ to $15$

Now,

let $x$	$-8$	$18$
let $y$	$4$	let $z$
$-10$	let $a$	let $b$

Now, in first row

$Sum=18-8+x=15\Rightarrow x=5$

Now in first column

$Sum=x+y-10=15\Rightarrow y=20$

Now in second Row

$Sum=20+4+z=15\Rightarrow z=-9$

Now in second column

$Sum=-8+4+a=15\Rightarrow a=19$

Now in third column

$Sum=18-9+b=15\Rightarrow b=6$

Therfore Required magic Square is

$5$	$-8$	$18$
$20$	$4$	$-9$
$-10$	$19$	$6$