$test_nums = ($total_nums <= 30)                          ? 1
           : ($total_nums >= 31 and  $total_nums <= 60)   ? 2
           : ($total_nums >= 61 and  $total_nums <= 90)   ? 3
           : ($total_nums >= 91 and  $total_nums <= 120)  ? 4
           : ($total_nums >= 121 and  $total_nums <= 150) ? 5
           : ($total_nums >= 151 and  $total_nums <= 180) ? 6;