diff --git a/combinations.rb b/combinations.rb
new file mode 100644
index 0000000..8797f64
--- /dev/null
+++ b/combinations.rb
@@ -0,0 +1,11 @@
+def combinations(arrayOne, arrayTwo)
+  result=[] 
+  arrayOne.each do |string|
+    arrayTwo.each do |string2|
+      result.push(string + string2)
+    end
+  end
+  return result
+end
+
+puts combinations(["hi", "bye", "hey", "jeff"], ["kayla", "john", "joe", "josh"])
diff --git a/factorial.rb b/factorial.rb
new file mode 100644
index 0000000..91dae4b
--- /dev/null
+++ b/factorial.rb
@@ -0,0 +1,10 @@
+def factorial(number)
+  result = 1
+  (1..number).each do |num|
+    result = result * num
+  end
+  return result
+end 
+
+puts factorial(5)
+
diff --git a/overlap.rb b/overlap.rb
new file mode 100644
index 0000000..5569b03
--- /dev/null
+++ b/overlap.rb
@@ -0,0 +1,35 @@
+def overlap(recArray1, recArray2)
+
+  width1 = (recArray1[0][0]...recArray1[1][0])
+  height1 = (recArray1[0][1]...recArray1[1][1])
+  width2 = (recArray2[0][0]...recArray2[1][0])
+  height2 = (recArray2[0][1]...recArray2[1][1])
+  
+  heightOverlap = false
+  widthOverlap = false
+  overlap = false 
+
+  width1.each do |range|
+    if width2.include? range
+      widthOverlap = true 
+    end
+  end
+
+  height1.each do |range|
+    if height2.include? range 
+      heightOverlap = true
+    end
+  end
+
+  if heightOverlap == true and widthOverlap == true 
+    overlap = true 
+  else
+    overlap = false 
+  end
+  return overlap
+end
+
+puts overlap([[0,0], [3,3]], [[1,1], [4,5]])
+puts overlap([[0,0], [1,4]], [[1,1], [3,2]])
+
+
diff --git a/power.rb b/power.rb
new file mode 100644
index 0000000..cef3a6b
--- /dev/null
+++ b/power.rb
@@ -0,0 +1,9 @@
+def power(base, exponent)
+  result = 1
+  exponent.times do 
+    result = result * base
+  end
+return result
+end
+
+puts power(8,3)
\ No newline at end of file
diff --git a/primes.rb b/primes.rb
new file mode 100644
index 0000000..3b1354e
--- /dev/null
+++ b/primes.rb
@@ -0,0 +1,16 @@
+def is_prime? (number)
+  result = true 
+  quotient = 2
+  while (quotient < number) and result == true 
+    if number%quotient == 0 
+      result = false 
+    else
+      quotient += 1
+    end
+  end
+  return result
+end
+
+puts is_prime?(7)
+puts is_prime?(3)
+puts is_prime?(14)
\ No newline at end of file
diff --git a/uniques.rb b/uniques.rb
new file mode 100644
index 0000000..2adb6d6
--- /dev/null
+++ b/uniques.rb
@@ -0,0 +1,12 @@
+def uniques(originalArray)
+  result = []
+  originalArray.each do |item|
+    unless result.include? item
+     result.push(item)
+    end
+  end
+  return result
+end
+
+
+puts uniques([1,5,5,2])