diff --git a/mathgenerator/mathgen.py b/mathgenerator/mathgen.py
index b7da40e..bd22657 100644
--- a/mathgenerator/mathgen.py
+++ b/mathgenerator/mathgen.py
@@ -370,7 +370,7 @@ def linearEquationsFunc(n = 2, varRange = 20, coeffRange = 20):
     problem = "\n".join(problem)
     return problem, solution
 
-def primeFactors(minVal=1, maxVal=200):
+def primeFactorsFunc(minVal=1, maxVal=200):
     a = random.randint(minVal, maxVal)
     n = a
     i = 2
@@ -387,7 +387,66 @@ def primeFactors(minVal=1, maxVal=200):
     solution = f"{factors}"
     return problem, solution
 
-def commonFactors(maxVal=100):
+def multiplyFractionsFunc(maxVal=10):
+    a = random.randint(1, maxVal)
+    b = random.randint(1, maxVal)
+    c = random.randint(1, maxVal)
+    d = random.randint(1, maxVal)
+    while (a == b):
+        b = random.randint(1, maxVal)
+    while (c == d):
+        d = random.randint(1, maxVal)
+    def calculate_gcd(x, y):
+        while(y):
+            x, y = y, x % y
+        return x
+    tmp_n = a * c
+    tmp_d = b * d
+    gcd = calculate_gcd(tmp_n, tmp_d)
+    x = f"{tmp_n//gcd}/{tmp_d//gcd}"
+    if (tmp_d == 1 or tmp_d == gcd):
+        x = f"{tmp_n//gcd}"
+    problem = f"({a}/{b})*({c}/{d})"
+    solution = x
+    return problem, solution
+
+def regularPolygonAngleFunc(minVal = 3,maxVal = 20):
+    sideNum = random.randint(minVal, maxVal)
+    problem = f"Find the angle of a regular polygon with {sideNum} sides"
+    exteriorAngle = round((360/sideNum),2)
+    solution = 180 - exteriorAngle
+    return problem, solution 
+  
+def combinationsFunc(maxlength=20):
+    def factorial(a):
+        d=1
+        for i in range(a):
+            a=(i+1)*d
+            d=a
+        return d
+    a= random.randint(10,maxlength)
+    b=random.randint(0,9)
+    solution= int(factorial(a)/(factorial(b)*factorial(a-b)))
+    problem= "Number of combinations from {} objects picked {} at a time ".format(a,b)
+    
+    return problem, solution
+  
+def factorialFunc(maxInput = 6):
+    a = random.randint(0, maxInput)
+    n = a
+    problem = str(a) + "! = "
+    b = 1
+    if a == 1:
+        solution = str(b)
+        return problem, solution
+    else:
+        while n > 0:
+            b *= n
+            n = n - 1
+        solution = str(b)
+        return problem, solution
+
+def commonFactorsFunc(maxVal=100):
     a = random.randint(1, maxVal)
     b = random.randint(1, maxVal)
     x, y = a, b
@@ -405,7 +464,6 @@ def commonFactors(maxVal=100):
     problem = f"Common Factors of {a} and {b} = "
     solution = arr
     return problem, solution
-    
 # || Class Instances
 
 #Format is:
@@ -438,5 +496,9 @@ systemOfEquations = Generator("Solve a System of Equations in R^2", 23, "2x + 5y
 distance2Point = Generator("Distance between 2 points", 24, "Find the distance between (x1,y1) and (x2,y2)","sqrt(distanceSquared)", distanceTwoPointsFunc)
 pythagoreanTheorem = Generator("Pythagorean Theorem", 25, "The hypotenuse of a right triangle given the other two lengths a and b = ", "hypotenuse", pythagoreanTheoremFunc)
 linearEquations = Generator("Linear Equations", 26, "2x+5y=20 & 3x+6y=12", "x=-20 & y=12", linearEquationsFunc) #This has multiple variables whereas #23 has only x and y
-primeFactors = Generator("Prime Factorisation", 27, "Prime Factors of a =", "[b, c, d, ...]", primeFactors)
-commonFactors = Generator("Common Factors", 28, "Common Factors of {a} and {b} = ","[c, d, ...]",commonFactors)
\ No newline at end of file
+primeFactors = Generator("Prime Factorisation", 27, "Prime Factors of a =", "[b, c, d, ...]", primeFactorsFunc)
+fractionMultiplication = Generator("Fraction Multiplication", 28, "(a/b)*(c/d)=", "x/y", multiplyFractionsFunc)
+angleRegularPolygon = Generator("Angle of a Regular Polygon",29,"Find the angle of a regular polygon with 6 sides","120",regularPolygonAngleFunc)
+combinations = Generator("Combinations of Objects",30, "Combinations available for picking 4 objects at a time from 6 distinct objects ="," 15", combinationsFunc)
+factorial = Generator("Factorial", 31, "a! = ", "b", factorialFunc)
+commonFactors = Generator("Common Factors", 32, "Common Factors of {a} and {b} = ","[c, d, ...]",commonFactorsFunc)