super crasy function checks whether n is dividable by 2 or subtractable by 5

check.js

function check(n) {
  var history  = "(" + n;
  var number = n;
    while (number > 3) {
      if ((number % 2)=== 0) {
        number = number / 2;
        history += ")/2"
      }
      else {
        number = number - 5;
        history += "-3"
      }
    }
  return history +" = "+ number;
}