diff --git a/Chapter 11/math fun b/Chapter 11/math fun
new file mode 100644
index 0000000..75a9735
--- /dev/null
+++ b/Chapter 11/math fun	
@@ -0,0 +1,14 @@
+console.log(Math.PI);
+console.log(Math.ceil(5.7));
+console.log(Math.floor(5.7));
+console.log(Math.round(5.7));
+console.log(Math.random());
+console.log(Math.floor(Math.random()*11)); // 0-10
+console.log(Math.floor(Math.random()*10)+1); // 1-10;
+console.log(Math.floor(Math.random()*100)+1); // 1-100;
+for (let x = 0; x < 100; x++) {
+  console.log(ranNum(1, 100));
+}
+function ranNum(min, max) {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+}