diff --git a/combinations.rb b/combinations.rb
new file mode 100644
index 0000000..ba3c2f7
--- /dev/null
+++ b/combinations.rb
@@ -0,0 +1,13 @@
+array1 = (["on", "in"])
+array2 = (["to", "rope"])
+
+def combinations array1, array2
+	result = []
+	array1.each do |a1|
+		array2.each do |a2|
+			result << (a1 + a2)
+		end
+	end
+	result
+end
+p combinations(array1, array2)
\ No newline at end of file
diff --git a/factorial.rb b/factorial.rb
new file mode 100644
index 0000000..7d6115d
--- /dev/null
+++ b/factorial.rb
@@ -0,0 +1,9 @@
+def factorial(variable)
+	product = 1
+	variable.times do 
+	 |n| product *= (n + 1)
+  end
+  product
+end
+
+puts factorial(5)
\ No newline at end of file
diff --git a/overlap.rb b/overlap.rb
new file mode 100644
index 0000000..b40f2bd
--- /dev/null
+++ b/overlap.rb
@@ -0,0 +1,12 @@
+Rect_A = [(0,0),(3,3)] = [(A.x1,A.y1),(A.x2,A.y2)]
+Rect_B = [(1,1),(4,5)] = [(B.x1,B.y1),(B.x2,B.y2)]
+
+def overlap(Rect_A, Rect_B)
+	if(A.x2 < B.x1 || A.x1 > B.x2)
+		return false
+	if (A.y2 > B.y1 || A.y1 < B.y2)
+		return false
+	end
+  return true
+end
+p overlap
\ No newline at end of file
diff --git a/power.rb b/power.rb
new file mode 100644
index 0000000..dbf118d
--- /dev/null
+++ b/power.rb
@@ -0,0 +1,12 @@
+def power(base, exponent)
+	total = 1
+	counter = 1
+
+	while counter <= exponent
+		total = total * base
+		counter += 1
+	end
+	total
+end
+
+puts power(3,4)
\ No newline at end of file
diff --git a/primes.rb b/primes.rb
new file mode 100644
index 0000000..ca9c452
--- /dev/null
+++ b/primes.rb
@@ -0,0 +1,15 @@
+
+def is_prime?(number)
+	number.times do |x|
+		if x > 1 && number % x == 0
+			return false
+		end
+	end
+	return true
+end
+
+p is_prime?(7)
+p is_prime?(14)
+
+
+
diff --git a/uniques.rb b/uniques.rb
new file mode 100644
index 0000000..3205467
--- /dev/null
+++ b/uniques.rb
@@ -0,0 +1,10 @@
+array = [1,5,"frog",2,1,3,"frog"]
+
+def uniques(array)
+    singulars = Array.new
+    array.each do |element|
+        singulars << element unless singulars.include?(element)    
+    end    
+  singulars
+end
+p uniques(array)
\ No newline at end of file