diff --git a/312/notes/math.bc b/312/notes/math.bc
new file mode 100644
index 0000000..c192761
--- /dev/null
+++ b/312/notes/math.bc
@@ -0,0 +1,18 @@
+# What is this?
+# Compilation of scripts to written for bc since bc is:
+# a. literally a calculator 
+# b. code is pretty dang readable and useful 
+
+# Simple GCD 
+define gcd(a,b) {
+	while(a != b) {
+		if(a>b) {
+			a = a - b;
+		}
+		if(b>a) {
+			b = b - a;
+		}
+	}
+	return a;
+}
+