Question

please solve this problem

Answer 1

this is simple question of averages
let the number be x
$x = ( \frac{x}{3} + \frac{x}{4} + \frac{x}{12} ) + 56 \ \\ x = \frac{2x}{3 } + 56 \\ \frac{x}{3} = 56 \\ x = 168$