Question

a positive number when multiplied by 7 times itself is equal to 567. what is the number

Answer 1

Hello dear,

Let the number be 'a'

a × 7a = 567

=> 7a² = 567

=> a² = 567/7

=> a² = 81

=> a = 9

so,

check

9×(7×9)

= 9×63

= 567
Hope it helps.

Answer 2

Let the no. be x
then according to question

x
$\times$
7
$x$
=567
so,7
${x}^{2}$
=567
so
${x}^{2} = 81$
thus x=9