A Twitter friend mentioned that her 3rd grade daughter had some tough math homework. Tried to solve it with JS.

third-grade-homework.js

var firstClue = function(min, max, digitSum) {

  for(var i = min; i < max; i++) {
    var digitArray = i.toString().split('');
    var digitTotal = 0;
    digitArray.forEach(function(digit) {
      digitTotal += parseInt(digit);
    });
    if ( digitTotal < digitSum ) {
      return i;
    }
  }
 
}

var secondClue = function(min, max, endsIn, fifth) {
  for(var i = min; i < max; i++) {
    if ( ( ( i * 2 ).toString().split('')[1] == endsIn.toString() ) && ( i / 5 === fifth ) ) {
      return i;
    }
  }
}


var thirdClue = function(min, max, digitSum, odd) {
  for(var i = min; i < max; i++) {
    var halfsies = i / 2
    var digitTotal = 0;
    var digitArray = i.toString().split('');
    digitArray.forEach(function(digit) {
      digitTotal += parseInt(digit);
    });
    if ( ( digitTotal === digitSum ) && ( halfsies % 2 === 1 ) ) {
      return i;
    }
  }
}



var fourthClue = function(min, max, bySix, byFour) {
  for(var i = min; i < max; i++) {
    var doubled = i * 2;
    var bySixResult = ( parseInt( ( i * 6 ).toString().split('')[1] ) === bySix )
    var byFourResult = ( parseInt( ( i * 4 ).toString().split('')[1] ) === byFour )
    if ( ( doubled > 20 ) && ( doubled < 40 ) && ( bySixResult ) && ( byFourResult ) ) {
      return i;
    }
  }
}


var fifthClue = function() {
  return "This has 2 answers I don't even... [12, 24]";
}



$(document).ready(function() {
  $('button').on('click', function() {
    var questionNumber = $(this).attr('class').split('question-')[1][0];
    var questionAnswer = $('.question-' + questionNumber + '-answer').html();
    
    if ( questionAnswer.length == 0 ) {
    
      switch(questionNumber) {
        case "1":
          appended = firstClue(31, 40, 5);
          break;
        case "2":
          appended = secondClue(16, 40, 0, 5);
          break;
        case "3":
          appended = thirdClue(0, 100, 4, true);
          break;
        case "4":
          appended = fourthClue(1, 100, 8, 2);
          break;
        case "5":
          appended = fifthClue();
          break;
      }
    
      $('.question-' + questionNumber + '-answer').html(appended);
    }   
  });
});