diff --git a/challenges/01-calc.py b/challenges/01-calc.py
index 87f5190..69f3c4d 100644
--- a/challenges/01-calc.py
+++ b/challenges/01-calc.py
@@ -2,3 +2,30 @@
 # input() always returns a string value. If you ever want someone
 # to enter a number you have to use the `int()` function to convert
 # what they typed in to a string.
+
+
+def math(operator, num1, num2):
+    # if adding
+    if (operator == "add"):
+        return num1 + num2
+    # else if subtracting 
+    elif (operator == "subtract"):
+        return num1 - num2 
+    # else if multiplying
+    elif (operator == "multiply"):
+        return num1 * num2
+        # num 1 * num 2
+    # else 
+    elif (operator == "divide"):
+        return num1 / num2
+        # num 1 / num 2
+    else:
+        return "try again"
+
+
+# print(math("divide", 4, 5))
+operator = input("What calculation would you like to do?")
+num1 = input("What is number 1?")
+num2 = input("What is number 2?")
+print(math(operator, int(num1), int(num2)))
+# math("divide", 8, 2)
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diff --git a/challenges/02-reverse.py b/challenges/02-reverse.py
index 8cf2677..2bb9955 100644
--- a/challenges/02-reverse.py
+++ b/challenges/02-reverse.py
@@ -6,3 +6,10 @@
 # several ways to reverse a string, and it's a good read!
 #
 # http://www.techbeamers.com/essential-python-tips-tricks-programmers/?utm_source=mybridge&utm_medium=blog&utm_campaign=read_more#tip1
+
+def reverse(string):
+    reversed = ""
+    for i in (string):
+        reversed = i + reversed
+    return reversed
+print(reverse("my_name_is_myles"))
diff --git a/challenges/03-bank.py b/challenges/03-bank.py
index 554cb1d..cc7bc26 100644
--- a/challenges/03-bank.py
+++ b/challenges/03-bank.py
@@ -1,3 +1,14 @@
 print("Welcome to Chase bank.")
 print("Have a nice day!")
 
+balance = input("Your current balance is\n")
+process = input("What would you like to do?\n")
+
+if process == "deposit":
+    question = input("How much would you like to deposit?\n")
+    balance = int(balance) + int(question)
+elif process == "withdraw":
+    question = input("How much would you like to withdraw? \n")
+    balance = int(balance) - int(question)
+
+print(f"Your current balance is {balance}")
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diff --git a/challenges/04-alphabetical.py b/challenges/04-alphabetical.py
index 5051ec4..8a5994f 100644
--- a/challenges/04-alphabetical.py
+++ b/challenges/04-alphabetical.py
@@ -1,3 +1,13 @@
 # You'll need to use a couple of built in functions to alphabetize a string. 
 # Try to avoid looking up the exact answer and look at built in functions for
 # lists and strings instead.
+
+def alphabetize(string):
+    alpha_list = sorted(string)
+    alpha_string = ''
+    for i in alpha_list:
+        alpha_string = f"{alpha_string}{i}"
+    return alpha_string
+
+
+print(alphabetize("alphabet"))
\ No newline at end of file