recursive-puzzler.js

var puzzlers = [
  function ( a ) { return 8*a - 10; },
  function ( a ) { return (a-3) * (a-3) * (a-3); },
  function ( a ) { return a * a + 4; },
  function ( a ) { return a % 5; }
];

var start = 2;

var applyAndEmpty = function(num, queueOfFunctions) {
  var value = queueOfFunctions.shift()(num);
 	alert(value);
  if (queueOfFunctions.length == 0) { return value; }
  return applyAndEmpty(value, queueOfFunctions);
};