diff --git a/ch09-writing-your-own-methods/ask.rb b/ch09-writing-your-own-methods/ask.rb
index 01716eb35..d8102b452 100644
--- a/ch09-writing-your-own-methods/ask.rb
+++ b/ch09-writing-your-own-methods/ask.rb
@@ -1,3 +1,12 @@
-def ask question
-  # your code here
-end
\ No newline at end of file
+def ask question 
+  while true
+    puts question
+    reply = gets.chomp.downcase
+
+    return true if reply == 'yes' 
+    return false if reply == 'no'
+
+    puts 'Please answer "yes" or "no".' 
+  end
+  answer 
+  end
\ No newline at end of file
diff --git a/ch09-writing-your-own-methods/old_school_roman_numerals.rb b/ch09-writing-your-own-methods/old_school_roman_numerals.rb
index ca6589f2d..3cee50bdf 100644
--- a/ch09-writing-your-own-methods/old_school_roman_numerals.rb
+++ b/ch09-writing-your-own-methods/old_school_roman_numerals.rb
@@ -1,3 +1,13 @@
 def old_roman_numeral num
-  # your code here
-end
\ No newline at end of file
+
+thousand = 'M' * (num / 1000)
+fivehundreds = thousand + 'D' * (num % 1000 / 500)
+hundreds = fivehundreds + 'C' * (num % 500 / 100)
+fifties = hundreds + 'L' * (num % 100 / 50)
+tenth = fifties + 'X' * (num % 50 / 10)
+fifth = tenth + 'V' * (num % 10 / 5)
+units = fifth + 'I' * (num % 5 / 1)
+
+units
+
+end
diff --git a/ch09-writing-your-own-methods/roman_numerals.rb b/ch09-writing-your-own-methods/roman_numerals.rb
index 5c93b59ac..f3ce82083 100644
--- a/ch09-writing-your-own-methods/roman_numerals.rb
+++ b/ch09-writing-your-own-methods/roman_numerals.rb
@@ -1,3 +1,36 @@
 def roman_numeral num
-  # your code here
-end
\ No newline at end of file
+thousand = num / 1000
+hundreds = num % 1000 / 100
+tenth = num % 100 / 10
+units = num % 10
+
+roman = 'M' * thousand
+
+	if hundreds == 9
+		roman = roman +'CM'
+	elsif hundreds == 4
+		roman = roman + 'CD'
+	else
+		roman = roman + 'D' * (num % 1000 / 500)
+		roman = roman + 'C' * (num % 500 / 100)
+	end
+
+	if tenth == 9
+		roman = roman + 'XC'
+	elsif tenth == 4
+		roman = roman +'XL'
+	else
+		roman = roman + 'L' * (num % 100 / 50)
+		roman = roman + 'X' * (num % 50 / 10)
+	end
+
+	if units == 9
+		roman = roman + 'IX'
+	elsif units == 4
+		roman = roman + 'IV'
+	else
+		roman = roman + 'V' * (num % 10 / 5)
+		roman = roman + 'I' * (num % 5 / 1)	
+	end
+end
+
diff --git a/ch10-nothing-new/dictionary_sort.rb b/ch10-nothing-new/dictionary_sort.rb
index c9893d0fd..07132da6e 100644
--- a/ch10-nothing-new/dictionary_sort.rb
+++ b/ch10-nothing-new/dictionary_sort.rb
@@ -1,3 +1,21 @@
 def dictionary_sort arr
-  # your code here
+rec_dict_sort arr, []
+end
+
+def rec_dict_sort unsorted, sorted
+    if unsorted.length <= 0
+    return sorted
+    end
+smallest = unsorted.pop
+still_unsorted = []
+unsorted.each do |tested_object|
+    if tested_object.downcase < smallest.downcase
+    still_unsorted.push smallest
+    smallest = tested_object
+    else
+    still_unsorted.push tested_object
+    end
+end
+sorted.push smallest
+rec_dict_sort still_unsorted, sorted
 end
\ No newline at end of file
diff --git a/ch10-nothing-new/english_number.rb b/ch10-nothing-new/english_number.rb
index c0129bc4e..970f5ab46 100644
--- a/ch10-nothing-new/english_number.rb
+++ b/ch10-nothing-new/english_number.rb
@@ -1,3 +1,64 @@
 def english_number number
-  # your code here
+	if number < 0 
+	return 'Please enter a number that isn\'t negative.'
+	end
+	if number == 0
+	return 'zero'
+	end
+
+num_string = '' 
+
+ones_place = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
+
+tens_place = ['ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety']
+
+teenagers = ['eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen']
+
+zillions = [['hundred', 2], ['thousand', 3], ['million', 6], ['billion', 9], ['trillion', 12], ['quadrillion', 15], ['quintillion', 18], ['sextillion', 21], ['septillion', 24], ['octillion', 27], ['nonillion', 30], ['decillion', 33], ['undecillion', 36], ['duodecillion', 39], ['tredecillion', 42], ['quattuordecillion', 45], ['quindecillion', 48], ['sexdecillion', 51], ['septendecillion', 54], ['octodecillion', 57], ['novemdecillion', 60], ['vigintillion', 63], ['googol', 100]]
+
+left = number
+
+	while zillions.length > 0
+	zil_pair = zillions.pop
+	zil_name = zil_pair[0]
+	zil_base = 10 ** zil_pair[1]
+	write = left/zil_base
+	left = left - write*zil_base
+	
+	if write > 0
+	prefix = english_number write
+	num_string = num_string + prefix + ' ' + zil_name
+
+	if left > 0
+	num_string = num_string + ' '
+	end
+end
+end
+
+write = left/10
+
+left = left - write*10
+
+	if write > 0
+	if ((write == 1) and (left > 0))
+	num_string = num_string + teenagers[left-1]
+	left = 0
+	else
+	num_string = num_string + tens_place[write-1]
+	end
+
+	if left > 0
+	num_string = num_string + '-'
+	end
+
+end
+
+write = left
+left = 0
+
+	if write > 0
+	num_string = num_string + ones_place[write-1]
+	end
+
+num_string
 end
diff --git a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
index 801de24bd..632d0f31d 100644
--- a/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
+++ b/ch10-nothing-new/ninety_nine_bottles_of_beer.rb
@@ -1 +1,10 @@
-# your code here
\ No newline at end of file
+num_at_start = 9999
+num_now = num_at_start 
+	while num_now > 2 
+		puts english_number(num_now).capitalize + ' bottles of beer on the wall, ' + english_number(num_now) + ' bottles of beer!' 
+
+		num_now = num_now - 1 
+
+		puts 'Take one down, pass it around, ' + english_number(num_now) + ' bottles of beer on the wall!' 
+
+	end
\ No newline at end of file
diff --git a/ch10-nothing-new/shuffle.rb b/ch10-nothing-new/shuffle.rb
index a486ad94c..009f0881f 100644
--- a/ch10-nothing-new/shuffle.rb
+++ b/ch10-nothing-new/shuffle.rb
@@ -1,3 +1,20 @@
 def shuffle arr
-  # your code here
+	final_array = []
+	while arr.length > 0
+		rand_index = rand(arr.length)
+		intial_index = 0
+		array = []
+		arr.each do |w|
+				if intial_index == rand_index
+					final_array.push(w)
+				else
+					array.push(w)
+				end
+
+				intial_index = intial_index + 1
+				end
+	arr = array
+	end
+
+return final_array
 end
\ No newline at end of file
diff --git a/ch10-nothing-new/sort.rb b/ch10-nothing-new/sort.rb
index 44c6deb58..121cf75e8 100644
--- a/ch10-nothing-new/sort.rb
+++ b/ch10-nothing-new/sort.rb
@@ -1,3 +1,24 @@
-def sort arr
-  # your code here
+def sort arr 
+rec_sort arr, [] 
+end 
+
+def rec_sort unsorted, sorted 
+	if unsorted.length <= 0 
+		return sorted 
+	end
+
+smallest = unsorted.pop
+still_unsorted = []
+
+unsorted.each do |tested_object|
+	if tested_object < smallest
+		still_unsorted.push smallest
+		smallest = tested_object
+	else
+		still_unsorted.push tested_object
+	end
+end
+
+sorted.push smallest 
+rec_sort still_unsorted, sorted 
 end
\ No newline at end of file
diff --git a/ch11-reading-and-writing/build_a_better_playlist.rb b/ch11-reading-and-writing/build_a_better_playlist.rb
index 3b31bd241..4923c8608 100644
--- a/ch11-reading-and-writing/build_a_better_playlist.rb
+++ b/ch11-reading-and-writing/build_a_better_playlist.rb
@@ -1,3 +1,38 @@
 def music_shuffle filenames
-  # your code here
+   filenames = filenames.sort
+  len = filenames.length
+
+   2.times do
+    l_idx = 0 # index of next card in left pile
+    r_idx = len/2 # index of next card in right pile
+    shuf = []
+    # NOTE: If we have an odd number of "cards",
+    # then the right pile will be larger.
+
+    while shuf.length < len
+      if shuf.length%2 == 0
+        # take card from right pile
+        shuf.push(filenames[r_idx])
+        r_idx = r_idx + 1
+      else
+        # take card from left pile
+        shuf.push(filenames[l_idx])
+        l_idx = l_idx + 1
+      end
+    end
+
+    filenames = shuf
+  end
+  
+  arr = []
+  cut = rand(len) # index of card to cut at
+  idx = 0
+
+  while idx < len
+    arr.push(filenames[(idx+cut)%len])
+    idx = idx + 1
+  end
+  
+  arr
 end
+
diff --git a/ch11-reading-and-writing/build_your_own_playlist.rb b/ch11-reading-and-writing/build_your_own_playlist.rb
index 801de24bd..cd38d0be3 100644
--- a/ch11-reading-and-writing/build_your_own_playlist.rb
+++ b/ch11-reading-and-writing/build_your_own_playlist.rb
@@ -1 +1,6 @@
-# your code here
\ No newline at end of file
+musics = shuffle(Dir['**/*.mp3']) 
+File.open 'playlist.m3u', 'w' do |f| 
+musics.each do |mp3| 
+f.write mp3+"\n" 
+end 
+end
\ No newline at end of file
diff --git a/ch11-reading-and-writing/safer_picture_downloading.rb b/ch11-reading-and-writing/safer_picture_downloading.rb
index 801de24bd..cf5a68e92 100644
--- a/ch11-reading-and-writing/safer_picture_downloading.rb
+++ b/ch11-reading-and-writing/safer_picture_downloading.rb
@@ -1 +1,24 @@
-# your code here
\ No newline at end of file
+Dir.chdir 'C:\Users\Laurent\Downloads' 
+pic_names = Dir['*.jpg']
+
+puts 'What would you like to call this batch?' 
+batch_name = gets.chomp 
+puts 
+print "Downloading #{pic_names.length} files: "
+
+pic_number = 1 
+pic_names.each do |name| 
+print '.' 
+if pic_number < 10 
+	new_name = "#{batch_name}0#{pic_number}.jpg" 
+else 
+	new_name = "#{batch_name}#{pic_number}.jpg" 
+end
+
+if File.exist?(new_name) == false
+File.rename name, new_name
+elsif File.exist?(new_name) == true
+	exit
+end
+pic_number = pic_number + 1 
+end 
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/birthdates.txt b/ch12-new-classes-of-objects/birthdates.txt
new file mode 100644
index 000000000..e5115be6a
--- /dev/null
+++ b/ch12-new-classes-of-objects/birthdates.txt
@@ -0,0 +1,8 @@
+Christopher Alexander, Oct 4, 1936
+Christopher Lambert, Mar 29, 1957
+Christopher Lee, May 27, 1922
+Christopher Lloyd, Oct 22, 1938
+Christopher Pine, Aug 3, 1976
+Christopher Plummer, Dec 13, 1927
+Christopher Walken, Mar 31, 1943
+The King of Spain, Jan 5, 1938
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/birthday_helper.rb b/ch12-new-classes-of-objects/birthday_helper.rb
index 801de24bd..4f8f61305 100644
--- a/ch12-new-classes-of-objects/birthday_helper.rb
+++ b/ch12-new-classes-of-objects/birthday_helper.rb
@@ -1 +1,14 @@
-# your code here
\ No newline at end of file
+birth_dates = {}
+File.read('birthdates.txt').each_line do |line|
+  line = line.chomp
+  comma = line.index(',') 
+$name = line[0..(comma - 1)] 
+$dob = line[-12..-1]
+ birth_dates[$name] = $dob
+end
+ puts "Enter a name"
+ name = gets.chomp
+  puts (birth_dates[name])[0..5] 
+
+
+
diff --git a/ch12-new-classes-of-objects/happy_birthday.rb b/ch12-new-classes-of-objects/happy_birthday.rb
index 801de24bd..a2cc48514 100644
--- a/ch12-new-classes-of-objects/happy_birthday.rb
+++ b/ch12-new-classes-of-objects/happy_birthday.rb
@@ -1 +1,23 @@
-# your code here
\ No newline at end of file
+puts "Enter your birth year in the following format: YYYY"
+year = gets.chomp.to_i
+puts "Enter your birth month in the following format: MM"
+month = gets.chomp.to_i
+puts "Enter your birth day in the following format: DD"
+day = gets.chomp.to_i
+
+y = Time.new.year - year
+m = Time.new.month - month
+d = Time.new.day - day
+ if m - month > 0 
+puts "You are #{y}years old"
+puts "SPANK!" * y
+elsif m -month == 0 and d - day >= 0
+puts "You are #{y}years old"
+puts "SPANK!" * y
+elsif m -month == 0 and d - day < 0
+puts "You are #{y-1}years old"
+puts "SPANK!" * (y-1)
+elsif m-month < 0
+puts "You are #{y-1}years old"
+puts "SPANK!" * (y-1)
+end
diff --git a/ch12-new-classes-of-objects/one_billion_seconds.rb b/ch12-new-classes-of-objects/one_billion_seconds.rb
index 801de24bd..c0c016c9b 100644
--- a/ch12-new-classes-of-objects/one_billion_seconds.rb
+++ b/ch12-new-classes-of-objects/one_billion_seconds.rb
@@ -1 +1,2 @@
-# your code here
\ No newline at end of file
+billion_seconds = (Time.local(1976, 8, 15, 21) + 3600) + 1000000000
+puts billion_seconds
\ No newline at end of file
diff --git a/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb b/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
index 037b6cb09..acddb91c6 100644
--- a/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
+++ b/ch12-new-classes-of-objects/party_like_its_roman_to_integer_mcmxcix.rb
@@ -1,3 +1,30 @@
 def roman_to_integer roman
-  # your code here
+  digit_vals = {'i' => 1,
+                'v' => 5,
+                'x' => 10,
+                'l' => 50,
+                'c' => 100,
+                'd' => 500,
+                'm' => 1000}
+  total = 0
+  prev = 0
+  index = roman.length - 1
+  while index >= 0
+    c = roman[index].downcase
+    index = index - 1
+    val = digit_vals[c]
+    if !val
+      puts 'This is not a valid roman numeral!'
+      return
+    end
+
+    if val < prev
+      val = val * -1
+    else
+      prev = val
+    end
+    total = total + val
+  end
+
+  total
 end
\ No newline at end of file
diff --git a/ch13-creating-new-classes/extend_built_in_classes.rb b/ch13-creating-new-classes/extend_built_in_classes.rb
index c3e793933..fdeb70a10 100644
--- a/ch13-creating-new-classes/extend_built_in_classes.rb
+++ b/ch13-creating-new-classes/extend_built_in_classes.rb
@@ -1,3 +1,23 @@
 class Integer
-  # your code here
-end
\ No newline at end of file
+  def factorial
+    if self <= 1
+      1
+    else
+      self * (self-1).factorial
+    end
+  end
+  def to_roman
+    roman = ''
+
+    roman = roman + 'M' * (self / 1000)
+    roman = roman + 'D' * (self % 1000 / 500)
+    roman = roman + 'C' * (self % 500 / 100)
+    roman = roman + 'L' * (self % 100 / 50)
+    roman = roman + 'X' * (self % 50 / 10)
+    roman = roman + 'V' * (self % 10 / 5)
+    roman = roman + 'I' * (self % 5 / 1)
+
+    roman
+  end
+end
+
diff --git a/ch13-creating-new-classes/interactive_baby_dragon.rb b/ch13-creating-new-classes/interactive_baby_dragon.rb
index 801de24bd..4f9d26ef3 100644
--- a/ch13-creating-new-classes/interactive_baby_dragon.rb
+++ b/ch13-creating-new-classes/interactive_baby_dragon.rb
@@ -1 +1,23 @@
-# your code here
\ No newline at end of file
+ 
+puts "How do you want to call your dragon?"
+name = gets.chomp
+dragon_name = Dragon.new name
+
+while true 
+puts "What do you want to do to your dragon? feed? walk? put to bed? toss? rock?"
+answer = gets.chomp.downcase
+
+if answer == "feed"
+	feed
+elsif answer == "walk"
+	walk
+elsif answer == "put to bed"
+	put_to_bed
+elsif answer == "toss"
+	toss
+elsif answer == "rock"
+	rock
+else
+    puts "This is not a valid answer. Please enter feed or walk or put to bed or toss or rock"
+end    
+end
\ No newline at end of file
diff --git a/ch13-creating-new-classes/orange_tree.rb b/ch13-creating-new-classes/orange_tree.rb
index 025d08907..3dba71319 100644
--- a/ch13-creating-new-classes/orange_tree.rb
+++ b/ch13-creating-new-classes/orange_tree.rb
@@ -5,7 +5,49 @@
 # have the tree die after 25 years.
 # check out the rspec spec/ch13/orange_tree_spec.rb to see what strings we're looking for in the responses.
 
-
 class OrangeTree
-  # your code here
-end
+  def initialize
+    @age = 0
+    @height = 0
+    @oranges = 0
+  end
+
+  def height
+    if @age <= 25
+      @height
+    else
+      "A dead tree is not very tall. :("
+    end
+  end
+
+  def one_year_passes
+    @age += 1
+    @height = (@age * 0.4).round(1)
+    if @age <= 5
+      @oranges = 0
+    elsif @age <= 25
+      @oranges = (@height * 15 - 25)
+        "This year your tree grew to #{@height}m tall, and produced #{@oranges.round} oranges."
+    elsif @age == 26
+        "Oh, no! The tree is too old, and has died. :("
+    else
+        "A year later, the tree is still dead. :("
+    end
+  end
+
+  def count_the_oranges
+    if @age <= 25
+       @oranges.round
+    else
+       "A dead tree has no oranges. :("
+    end
+  end
+
+  def pick_an_orange
+    if @age <=25
+       @oranges -= 1
+    else
+       "A dead tree has nothing to pick. :("
+    end
+  end
+end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/better_program_logger.rb b/ch14-blocks-and-procs/better_program_logger.rb
index 0e2e18d57..5cd52fd55 100644
--- a/ch14-blocks-and-procs/better_program_logger.rb
+++ b/ch14-blocks-and-procs/better_program_logger.rb
@@ -1,3 +1,30 @@
-def log desc, &block
-  # your code here
-end
\ No newline at end of file
+$logger_depth = 0
+
+def better_log desc, &block
+  prefix = ' '*$logger_depth
+
+  puts prefix + 'Beginning "' + desc + '"...'
+
+  $logger_depth = $logger_depth + 1
+  
+  result = block.call
+
+  $logger_depth = $logger_depth - 1
+  puts prefix + '..."' + desc + '" finished, returning: ' + result.to_s
+end
+
+better_log 'outer block' do
+  better_log 'some little block' do
+    better_log 'teeny-tiny block' do
+      'lOtS oF lOVe'.downcase
+    end
+
+    7 * 3 * 2
+  end
+
+  better_log 'yet another block' do
+    '!doof naidnI evol I'.reverse
+  end
+
+  '0' == 0
+end
diff --git a/ch14-blocks-and-procs/even_better_profiling.rb b/ch14-blocks-and-procs/even_better_profiling.rb
index b01b78fd8..23d8d31fd 100644
--- a/ch14-blocks-and-procs/even_better_profiling.rb
+++ b/ch14-blocks-and-procs/even_better_profiling.rb
@@ -1,3 +1,28 @@
 def profile block_description, &block
-  # your code here
+
+  profiling_on = true
+
+  if profiling_on
+    start_time = Time.new
+    block.call
+    duration = Time.new - start_time
+    puts "#{block_description}: #{duration} seconds"
+  else
+    block.call
+  end
+end
+
+profile '25000 doublings' do
+  number = 1
+  25000.times do
+    number = number + number
+  end
+  puts "#{number.to_s.length} digits"
+end
+
+profile 'count to a million' do
+  number = 0
+  100000.times do
+    number = number + 1
+  end
 end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/grandfather_clock.rb b/ch14-blocks-and-procs/grandfather_clock.rb
index 916f6d354..26e29ed4a 100644
--- a/ch14-blocks-and-procs/grandfather_clock.rb
+++ b/ch14-blocks-and-procs/grandfather_clock.rb
@@ -1,3 +1,17 @@
 def grandfather_clock &block
-  # your code here
+  hour = Time.new.hour
+  if hour >= 13
+    hour = hour - 12
+  end
+
+  if hour == 0
+    hour = 12
+  end
+  
+  hour.times do
+    block.call
+  end
+end
+grandfather_clock do
+  puts 'DONG!'
 end
\ No newline at end of file
diff --git a/ch14-blocks-and-procs/program_logger.rb b/ch14-blocks-and-procs/program_logger.rb
index 0e2e18d57..3438199fb 100644
--- a/ch14-blocks-and-procs/program_logger.rb
+++ b/ch14-blocks-and-procs/program_logger.rb
@@ -1,3 +1,17 @@
-def log desc, &block
-  # your code here
-end
\ No newline at end of file
+def program_log desc, &block
+  puts 'Beginning "' + desc + '"...'
+  result = block.call
+  puts '..."' + desc + '" finished, returning: ' + result.to_s
+end
+
+program_log 'outer block' do
+  program_log 'some little block' do
+    1**1 + 2**2
+  end
+
+  program_log 'yet another block' do
+    '!doof iahT ekil I'.reverse
+  end
+
+  '0' == 0
+end