diff --git a/src/index.js b/src/index.js
index d54b3622..74db460a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,12 +1,41 @@
 
 exports.min = function min (array) {
-  return 0;
+  if(!array || array.length === 0){
+    return 0;
+  } else {
+    let number = array[0]
+    for (let i = 1; i < array.length; i++) {
+      if (array[i] < number) {
+        number = array[i]
+      }
+    } 
+    return number
+  }
 }
 
 exports.max = function max (array) {
-  return 0;
+  if(!array || array.length === 0){
+    return 0;
+  } else {
+    let number = array[0]
+    for (let i = 1; i < array.length; i++) {
+      if (array[i] > number) {
+        number = array[i]
+      }
+    } 
+    return number
+  }
 }
 
 exports.avg = function avg (array) {
-  return 0;
+  if(!array || array.length === 0){
+    return 0;
+  } else {
+    let summ = 0;
+    for (let i = 0; i < array.length; i++) {
+    summ += array[i]
+    }
+    let result = summ / array.length;
+    return result
+  }
 }