diff --git a/src/index.js b/src/index.js
index d54b3622..85b17b34 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,12 +1,25 @@
-
-exports.min = function min (array) {
-  return 0;
+exports.min = function min(arr) {
+    if (!arr || arr.length == 0) {
+        return 0;
+    }
+    return Math.min(...arr);
 }
 
-exports.max = function max (array) {
-  return 0;
+
+exports.max = function max(arr) {
+    if (!arr || arr.length == 0) {
+        return 0;
+    }
+    return Math.max(...arr);
 }
 
-exports.avg = function avg (array) {
-  return 0;
+exports.avg = function avg(arr) {
+    if (!arr || arr.length == 0) {
+        return 0;
+    }
+    let sum = 0;
+    for (let i = 0; i < arr.length; i++) {
+        sum += Number(arr[i]);
+    }
+    return sum / arr.length;
 }