diff --git a/src/index.js b/src/index.js
index d54b3622..5664cfc0 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,12 +1,23 @@
-
 exports.min = function min (array) {
-  return 0;
+  if (!array || array.length === 0){
+    return 0;
+  }else {
+    return Math.min.apply(null, array)
+  }
 }
 
 exports.max = function max (array) {
-  return 0;
+  if (!array || array.length === 0){
+    return 0;
+  }else {
+    return Math.max.apply(null, array)
+  }
 }
 
 exports.avg = function avg (array) {
-  return 0;
+  if (!array || array.length === 0){
+    return 0;
+  }else {
+    return array.reduce((acc, cur) => (acc + cur), 0) / array.length;
+  }
 }