diff --git a/Problem Statement 1/README.md b/Problem Statement 1/README.md
deleted file mode 100644
index 6aaeab6..0000000
--- a/Problem Statement 1/README.md	
+++ /dev/null
@@ -1,10 +0,0 @@
-# Problem Statement-1.
-
-
-***
-### Make a desktop assistant using Python as its backend
-
-
-
-***
-
diff --git a/Problem Statement 2/README.md b/Problem Statement 2/README.md
deleted file mode 100644
index baf2489..0000000
--- a/Problem Statement 2/README.md	
+++ /dev/null
@@ -1,10 +0,0 @@
-# Problem Statement-2.
-
-
-***
-### Make a Simple Image Editing app 
-
-
-
-***
-
diff --git a/Problem Statement 3/README.md b/Problem Statement 3/README.md
index b4683b3..bf60d4f 100644
--- a/Problem Statement 3/README.md	
+++ b/Problem Statement 3/README.md	
@@ -1,9 +1,32 @@
+Link for task submission video 
+TASK 3 CALCULATOR Using Python : 
+**https://youtu.be/1OeMWxhRSOA**
+
+
 # Problem Statement-3.
 
 
 ***
 ### Make a calculator with GUI
 
+Hello
+I’m Chetan Chinchulkar from IITG
+
+This video is regarding problem statement 3 under GameOfCodes. GameOfCodes Python is a coding competition based on Python problem statements.
+Problem statement 3 is Calculator with GUI using Python
+
+There are two versions of the calculator :
+Standard calculator
+Bsic mathemcatival operations are available
+Scientific calculator
+Advanced mathematical operations like trigometric functions,exponential etc are added
+
+In addition to this, it has Rand button to randomly generate and show any random number. This also has Signum function.
+
+Error Handling
+The GUI takes care of varies error by correspondingly displaying error messages.
+
+Uniqueness of this calculator is copying the result, and also has age calculator
 
 
 ***
diff --git a/Problem Statement 3/__pycache__/age_calculator.cpython-38.pyc b/Problem Statement 3/__pycache__/age_calculator.cpython-38.pyc
new file mode 100644
index 0000000..9c1379e
Binary files /dev/null and b/Problem Statement 3/__pycache__/age_calculator.cpython-38.pyc differ
diff --git a/Problem Statement 3/age.ico b/Problem Statement 3/age.ico
new file mode 100644
index 0000000..e5f7386
Binary files /dev/null and b/Problem Statement 3/age.ico differ
diff --git a/Problem Statement 3/age_calculator.py b/Problem Statement 3/age_calculator.py
new file mode 100644
index 0000000..654fc8c
--- /dev/null
+++ b/Problem Statement 3/age_calculator.py	
@@ -0,0 +1,104 @@
+# importing modules
+from email import message
+from tkinter import *
+from datetime import date,datetime
+from tkinter import messagebox
+
+
+root = Tk()    # creating window
+root.title("AGE-CALCULATOR")   # setting up title
+root.configure(bg="#fff")   # setting up background color
+root.geometry("400x300")    # fixing the size of the window
+root.iconbitmap("age.ico")  # set Icon
+new = Label(root, bg="#fff")  # declaring a label
+new.grid(row=5, column=0, columnspan=3)
+
+today = str(date.today())    # getting current date using datetime module
+list_today = today.split("-")  # converting into a list
+
+
+# defining a function to calculate age
+def age(b_date, b_month, b_year):
+    try:
+        global today
+        global new
+
+
+        date_string = entry_year.get()+'-'+entry_month.get()+'-'+entry_date.get()
+        birthdate = datetime.strptime(date_string, '%Y-%m-%d').date()
+
+        if birthdate>date.today():
+            messagebox.showwarning("WARNING", "You are not born yet \n Enter correct date")
+        else:
+            new.grid_forget()
+            b_date = int(entry_date.get())
+            b_month = int(entry_month.get())
+            b_year = int(entry_year.get())
+            c_date = int(list_today[2])
+            c_month = int(list_today[1])
+            c_year = int(list_today[0])
+            month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
+            if b_date > c_date:
+                c_month = c_month-1
+                c_date = c_date+month[b_month-1]
+            if b_month > c_month:
+                c_year = c_year-1
+                c_month = c_month+12
+            resultd = str(c_date-b_date)
+            resultm = str(c_month-b_month)
+            resulty = str(c_year-b_year)
+            new = Label(root, text="YOUR AGE \n"+resulty+" YEARS "+resultm+" MONTHS " +
+                                resultd+" DAYS ", fg="#000", bg="#D5C6FF", borderwidth=6)
+            new.config(font=("Arial Rounded MT Bold", 15))
+            new.grid(row=5, column=0, columnspan=3)
+    except Exception as err:
+        messagebox.showerror("Error", "Please enter a valid date \n Error : "+str(err))
+
+
+# defining a function to clear the previous entries
+def clean(entry_date, entry_month, entry_year):
+    global new
+    new.grid_forget()
+    entry_date.delete(0, END)
+    entry_month.delete(0, END)
+    entry_year.delete(0, END)
+
+
+# creating widgets such as labels,entry boxes and buttons and fixing its position onto window
+title_label = Label(root, text="AGE CALCULATOR", borderwidth=10, fg="#404042", bg="#fff")
+title_label.config(font=("Arial Rounded MT Bold", 29))
+title_label.grid(row=0, column=0, columnspan=3)
+label_date = Label(root, text="BIRTH DATE : ", borderwidth=4, fg="#404042", bg="#fff")
+label_date.config(font=("Arial Rounded MT Bold", 15))
+label_date.grid(row=1, column=0)
+label_month = Label(root, text="BIRTH MONTH : ", borderwidth=5, fg="#404042", bg="#fff")
+label_month.config(font=("Arial Rounded MT Bold", 15))
+label_month.grid(row=2, column=0)
+label_year = Label(root, text="BIRTH YEAR : ", borderwidth=9, fg="#404042", bg="#fff")
+label_year.config(font=("Arial Rounded MT Bold", 15))
+label_year.grid(row=3, column=0)
+
+entry_date = Entry(root, width=20, borderwidth=3)
+entry_month = Entry(root, width=20, borderwidth=3)
+entry_year = Entry(root, width=20, borderwidth=3)
+
+entry_date.grid(row=1, column=2)
+entry_month.grid(row=2, column=2)
+entry_year.grid(row=3, column=2)
+
+# getting the value in the entry boxes
+b_date = entry_date.get()
+b_month = entry_month.get()
+b_year = entry_year.get()
+
+# calling age function in button widget
+submit = Button(root, text="GET AGE!!", width=10, anchor=CENTER, command=lambda: age(b_date, b_month, b_year),
+                fg="black" )
+submit.grid(row=4, column=0)
+
+# calling clean function in button widget
+clear = Button(root, text="CLEAR", width=10, command=lambda: clean(entry_date, entry_month, entry_year),
+               fg="black")
+clear.grid(row=4, column=2)
+
+root.mainloop()
diff --git a/Problem Statement 3/images/logo1.png b/Problem Statement 3/images/logo1.png
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diff --git a/Problem Statement 3/images/logo2.ico b/Problem Statement 3/images/logo2.ico
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index 0000000..c5dce77
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diff --git a/Problem Statement 3/images/logo2.png b/Problem Statement 3/images/logo2.png
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index 0000000..40b1454
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diff --git a/Problem Statement 3/main_calc.py b/Problem Statement 3/main_calc.py
new file mode 100644
index 0000000..bc0cfad
--- /dev/null
+++ b/Problem Statement 3/main_calc.py	
@@ -0,0 +1,372 @@
+from ast import Try
+from cgitb import text
+from tkinter import *
+from tkinter import messagebox
+from math import pi, e, sin, cos, tan, log
+import tkinter.font
+import random
+import math
+from datetime import date
+
+
+
+
+
+
+window = Tk()
+
+window.geometry("722x400")
+window.resizable(0, 0)
+window.title("Calcualtor")
+
+icon = PhotoImage(file="./images/logo2.png")
+
+window.iconphoto(False, icon)
+window.iconbitmap("./images/logo2.ico")
+
+
+
+cal = Frame(window, width=300, height=500)
+cal.grid()
+cal.config(bg='#f0f0f0')
+equation = StringVar()
+
+# Area to input the equation
+input_area = Entry(cal, textvariable=equation, width=60, font=("Comic Sans MS", 15), bd=10, justify=LEFT, state=DISABLED,
+             disabledbackground="white", disabledforeground="black")
+input_area.insert(0, "0")
+input_area.grid(row=0, columnspan=8)
+
+font = tkinter.font.Font(size=12, weight="bold", family='Helvetica',)
+
+
+def about():
+    messagebox.showinfo(
+        'About', "\n \n \n   Made by : Chetan Chinchulkar   \n Institute : IIT Guwahati \n Branch : Engineering Physics \n \n")
+
+
+def standard():
+    window.geometry('361x400')
+    input_area['width'] = 28
+    input_area.grid(row=0, columnspan=4, sticky=EW)
+    window.title("Standard Calculator")
+
+def scientific():
+    window.geometry('722x400')
+    input_area['width'] = 60
+    input_area.grid(row=0, columnspan=8)
+    window.title("Scientific Calculator")
+
+def sgn(a):
+    return 1 if a>0 else -1 if a<0 else 0
+
+def age_cal():
+    import age_calculator
+
+new_menu = Menu(window)
+filemenu = Menu(new_menu, tearoff=0)
+new_menu.add_cascade(label="File", menu=filemenu)
+filemenu.add_command(label="Standard", command=standard)
+filemenu.add_command(label="Scientific", command=scientific)
+filemenu.add_separator()
+filemenu.add_command(label="Age Calculator", command=age_cal)
+filemenu.add_separator()
+filemenu.add_command(label="About", command=about)
+filemenu.add_separator()
+filemenu.add_command(label="Exit", command=quit)
+window.config(menu=new_menu)
+
+
+value = ""
+ans = ""
+expression = ""
+history = {}
+
+
+h = 2
+w = 7
+actvbgnd = 'white'
+bg1 = 'wheat3'
+bg2 = "burlywood1"
+bg3 = "burlywood2"
+bg4 = "tan1"
+fg1 = "white"
+fg2 = "black"
+
+numberpad = [7, 8, 9, 4, 5, 6, 1, 2, 3]
+
+class Application(Frame):
+    def __init__(self, master, *args, **kwargs):
+        Frame.__init__(self, master, *args, **kwargs)
+        self.createWidgets()
+
+    def clearall(self):
+        global expression
+        global equation
+        global value
+        global ans
+        expression=''
+        value=''
+        ans=''
+        equation.set(expression)
+
+    def clearback(self):
+        result1=""
+        result2=""
+        global equation
+        global expression
+        global value
+        global ans
+
+        expression = input_area.get()
+        temp1= list(expression)    
+        temp2= list(value)
+            
+        if value=='':
+            temp1=[]
+            temp2=[]
+        elif expression[-5:] in ["asin(","acos(","atan("]:
+            for _ in range(5):temp1.pop()
+            for _ in range(10):temp2.pop()
+    
+        elif expression[-4:]=="log(":
+            for _ in range(4):temp1.pop()
+            for _ in range(11):temp2.pop()
+            
+        elif expression[-4:] in ['sin(','cos(','tan(']:
+            for _ in range(4): temp1.pop()
+            for _ in range(9): temp2.pop()
+        
+        elif expression[-4:]=='sgn(':
+            for _ in range(4): temp1.pop()
+            for _ in range(4): temp2.pop()
+            
+        elif expression[-3:]=='ln(':
+            for _ in range(3):temp1.pop()
+            for _ in range(9): temp2.pop()
+            
+        elif expression[-2:]=='e^':
+            for _ in range(2):temp1.pop()
+            for _ in range(8): temp2.pop()
+            
+        elif expression[-1]=='^':
+            for _ in range(1):temp1.pop()
+            for _ in range(2): temp2.pop()
+
+        elif expression[-1]=="√":
+            for _ in range(1):temp1.pop()
+            for _ in range(10):temp2.pop()
+            
+        elif expression[-1]=='π':
+            for _ in range(1):temp1.pop()
+            for _ in range(7): temp2.pop()
+            
+        elif expression[-1]=='e':
+            for _ in range(1):temp1.pop()
+            for _ in range(6): temp2.pop() 
+
+        elif expression[-1]=='%':
+            for _ in range(1):temp1.pop()
+            for _ in range(4): temp2.pop()      
+            
+        else: 
+            temp1.pop()
+            temp2.pop()
+            
+        for element in range(len(temp1)):
+            result1+=temp1[element]
+        expression = result1
+        equation.set(expression)
+            
+        for element in range(len(temp2)):
+            result2+=temp2[element]
+            
+        value=result2
+        try:ans = str(eval(value))
+        except:pass
+    
+    def pressbtn(self,num):
+        global expression 
+        global value
+        global ans
+        expression = expression + str(num)
+        equation.set(expression)
+        if num in ["1","2","3","4","5","6","7","8","9","0","(",")","00"]:
+            value += num
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+            
+        elif num in ["+",'-','/','*','.','1/','sgn(']:
+            value += num
+            
+        elif num in ['asin(','acos(','atan(','sin(','cos(','tan(']:
+            value += 'math.'+ num
+        
+        elif num=='^':value += '**'
+        
+        elif num=='%':
+            value += '/100'
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+        elif num=='^2':
+            value += '**2'
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+        elif num=='^3':
+            value += '**3'
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+
+        elif num=='√(':value += 'math.sqrt('
+        
+        elif num=='e':
+            value += 'math.e'
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+        elif num=='π':
+            value += 'math.pi'
+            try:ans = str(eval(value))
+            except:ans = "Invalid Expression"
+        elif num=='log(':value += 'math.log10('
+        elif num=='ln(':value += 'math.log('
+        elif num=='e^':value += 'math.e**'
+
+
+    def equal_calc(self):
+        global expression
+        global ans
+        global value
+
+        # print(expression)
+        # print(ans)
+        # print(value)
+
+        if expression=='':
+            messagebox.showerror("Error", "Please enter an expression")
+        else:
+            try:
+                ans = str(eval(value))
+                equation.set(ans)
+                history[expression] = ans
+
+                # print(result)
+                messagebox.showinfo("Result", expression + " = " + str(ans))
+                ans=''
+                value=''
+                expression=''
+            except Exception as err:
+                
+                # messagebox.showerror("Calculation Error", err)
+                messagebox.showerror("Calculation Error", "ERROR...")
+                equation.set("ERROR...")
+
+    def copy_res(self):
+        global expression
+        
+        if expression=='':
+                messagebox.showerror("Error", "Please enter an expression")
+        else:
+            import subprocess
+            subprocess.run("pbcopy",universal_newlines=True, input=input_area.get())
+            messagebox.showinfo("Copied", "Result copied to clipboard")
+
+    def rand(self):
+        # input_area.config(text= random.random())
+        global ans
+        global expression
+        global value
+
+        ans = (random.random())
+        expression = str(ans)
+        value = str(ans)
+        equation.set(ans)
+
+    def check_history(self):
+        history_text = []
+        for key,value in history.items():
+            history_text.append(key + " : " + value)
+        
+        if history_text==[]:
+            messagebox.showinfo("History", "No calculations done yet")
+        else:
+            messagebox.showinfo("History", "\n".join(history_text))
+
+    def createWidgets(self):
+        # self.display = Entry(self, font=("Helvetica", 16), borderwidth=0, relief=RAISED, justify=RIGHT)
+        # self.display.insert(0, "0")
+        # self.display.grid(row=0, column=0, columnspan=5)
+
+        i=0
+        for j in range(3):
+            for k in range(3):
+                Button(cal,command  = lambda x = str(numberpad[i]) : self.pressbtn(x), text = str(numberpad[i]), bg= bg1, fg=fg2,activebackground=actvbgnd,
+                    height=h, width=w,font= font).grid(row=j+2,column=k)
+                i+=1
+
+        r=5
+        c=7
+        Button(cal,command  = lambda: self.pressbtn('0'),  text = "0", bg= bg1, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r,column= c-7)
+
+        Button(cal,command  = lambda: self.pressbtn('00'),text = "00", bg= bg1, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r,column= c-6)
+
+        Button(cal,command  = self.clearback,            text = "C", bg= bg2, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-4,column= c-7)
+
+        Button(cal,command  = self.clearall,              text = "AC",bg= bg2, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-4,column= c-6)
+
+        Button(cal,command  = lambda: self.pressbtn('.'), text = "•", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r,column=c-5)
+
+        Button(cal,command  = lambda: self.pressbtn('+'), text = "+", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-2,column=c-4)
+
+        Button(cal,command  = lambda: self.pressbtn('-'),  text = "–", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-3,column=c-4)
+
+        Button(cal,command  = lambda: self.pressbtn('/'),   text = "/", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-4,column=c-5)
+
+        Button(cal,command  = lambda: self.pressbtn('*'),  text = "✶", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r-4,column=c-4)
+
+        Button(cal,command  = self.equal_calc,   text = "=", bg= bg2, fg=fg2, activebackground = actvbgnd, 
+                        height=3*h,width=w,font= font,pady=10).grid(row=r-1,column=c-4,rowspan=2,)
+        
+        Button(cal,command  = self.rand,  text = "Rand", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w,font= font).grid(row=r+1,column=c-7)
+
+        Button(cal,command  = self.copy_res,  text = "Copy Result", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=w ,font= font).grid(row=r+1,column=c-6)
+        
+        Button(cal,command  = self.check_history,  text = "Check History", bg= bg3, fg=fg2, activebackground = actvbgnd, 
+                        height=h, width=2*w ,font= font).grid(row=r+1,column=c-5,columnspan=2)
+
+
+
+        list1=['(',')','%','asin','sin','log','x^2','acos','cos','ln','x^3','atan','tan','e^x','1/x','x^y','e',"π",'√x','sgn']
+        list2=['(',')','%','asin(','sin(','log(','^2','acos(','cos(','ln(','^3','atan(','tan(','e^','1/','^','e',"π",'√(','sgn(']
+        i=0
+        for j in range(5):
+            for k in range(4):
+                Button(cal,command  = lambda x= list2[i]: self.pressbtn(x),  text = list1[i], bg=bg4,  fg= fg2,activebackground=actvbgnd,
+                    height=h,width=w,font= font).grid(row=j+1,column=k+4)
+                i+=1
+
+        msize=60
+        cal.rowconfigure(0,minsize=50)
+        for i in range(1,6):
+            cal.rowconfigure(i,minsize=60)
+
+        msize = 90
+        for i in range(8): 
+            cal.columnconfigure(i,minsize= msize)
+    
+
+     
+
+app = Application(window)	
+
+window.mainloop()
diff --git a/Problem Statement 3/requirements.txt b/Problem Statement 3/requirements.txt
new file mode 100644
index 0000000..a70021f
--- /dev/null
+++ b/Problem Statement 3/requirements.txt	
@@ -0,0 +1,4 @@
+autopep8==1.6.0
+pycodestyle==2.8.0
+pyglet==1.5.26
+toml==0.10.2
diff --git a/README.md b/README.md
index dd00367..48eee3f 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+Link for task submission video 
+TASK 3 CALCULATOR Using Python : 
+**https://youtu.be/1OeMWxhRSOA**
+
 # GAME OF CODES