diff --git a/power.rb b/power.rb
new file mode 100644
index 0000000..4633688
--- /dev/null
+++ b/power.rb
@@ -0,0 +1,72 @@
+def power(base, exponent)
+	result = 1
+	for i in 0...exponent
+		result = result * base
+	end
+	return result
+end
+
+def factorial(num)
+	result = 1
+	for i in 1..num
+		result = result * i
+	end
+	return result
+end
+
+def uniques(a)
+	result = Array.new 
+	a.each do |item|
+		if result.include? item
+		else
+			result.push(item)
+		end
+	end
+	return result
+end
+
+def combinations(a, a2)
+	result = Array.new	
+	a.each do |prefix|
+		a2.each do |suffix|
+			result.push(prefix + suffix)
+		end
+	end
+	return result
+end
+
+def is_prime?(num)
+	(2..Math.sqrt(num)).each { |i| return false if num % i == 0}
+	true
+end
+
+def overlap(rect1, rect2)
+  x_min = [rect1[0][0], rect2[0][0]].max
+  x_max = [rect1[1][0], rect2[1][0]].min
+
+  y_min = [rect1[0][1], rect2[0][1]].max
+  y_max = [rect1[1][1], rect2[1][1]].min
+  
+  if ((x_max <= x_min) || (y_max <= y_min))
+	return false
+  else
+	return true
+  end
+
+end
+
+ARGV.each do |x|
+	x	
+end
+a = ARGV[0].to_i
+b = ARGV[1].to_i
+puts power(a,b)
+puts factorial(b)
+print uniques([1,5,'frog',2,1,3,'frog'])
+puts ''
+print combinations(['on','in'],['to','rope'])
+puts ''
+puts is_prime?(7)
+puts is_prime?(14)
+puts overlap( [ [0,0],[3,3] ], [ [1,1],[4,5] ] )
+puts overlap( [ [0,0],[1,4] ], [ [1,1],[3,2] ] )