# A ternary
$test_nums = ( $total_nums <= 30 ? 1 :
	       $total_nums <= 60 ? 2 :
	       $total_nums <= 90 ? 3 :
	       $total_nums <= 120 ? 4 :
	       $total_nums <= 150 ? 5 :
	       $total_nums <= 180 ? 6 :
	       undef );

# Simple division
use POSIX 'ceil';
$test_nums = ceil( $total_nums / 30 );