diff --git a/0-module/1-task/index.js b/0-module/1-task/index.js
index 148ea5e..3e5e23f 100644
--- a/0-module/1-task/index.js
+++ b/0-module/1-task/index.js
@@ -1,3 +1,3 @@
 function sum(m, n) {
-  // ваш код...
+  return m + n; // ваш код...
 }
diff --git a/1-module/1-task/index.js b/1-module/1-task/index.js
index 977f6f3..df94e43 100644
--- a/1-module/1-task/index.js
+++ b/1-module/1-task/index.js
@@ -1,3 +1,8 @@
 function factorial(n) {
-  // ваш код...
+ 
+    let fact = 1;
+    for (let i = 1; i <= n; i++) {
+      fact = fact * i;
+    }
+    return fact;  // мой код...
 }
diff --git a/1-module/2-task/index.js b/1-module/2-task/index.js
index e59bf21..619a9cb 100644
--- a/1-module/2-task/index.js
+++ b/1-module/2-task/index.js
@@ -10,7 +10,12 @@ function print(text) {
  * чтобы функция sayHello работала корректно
  */
 function isValid(name) {
-  // ваш код...
+  if (name === null || name.includes(" ") || name.length < 4 ) {
+     return false;
+  } 
+  else {
+    return true;
+  }             // мой код...
 }
 
 function sayHello() {
diff --git a/1-module/3-task/index.js b/1-module/3-task/index.js
index 5c3e6a5..e651f4e 100644
--- a/1-module/3-task/index.js
+++ b/1-module/3-task/index.js
@@ -1,3 +1,3 @@
 function ucFirst(str) {
-  // ваш код...
+  return (str.slice(0, 1).toUpperCase () + str.slice(1)); // мой код...
 }
diff --git a/1-module/4-task/index.js b/1-module/4-task/index.js
index 08684b7..5d7a31f 100644
--- a/1-module/4-task/index.js
+++ b/1-module/4-task/index.js
@@ -1,3 +1,5 @@
-function checkSpam(str) {
-  // ваш код...
-}
+function checkSpam(str) {  // мой код...
+  let strtoLowerCase = str.toLowerCase();
+  return strtoLowerCase.includes('1xbet')  ||  strtoLowerCase.includes('xxx');
+  
+}
\ No newline at end of file
diff --git a/1-module/5-task/index.js b/1-module/5-task/index.js
index b1eda21..8039ab6 100644
--- a/1-module/5-task/index.js
+++ b/1-module/5-task/index.js
@@ -1,3 +1,3 @@
 function truncate(str, maxlength) {
-  // ваш код...
+  return str.length > maxlength ? str.slice(0, maxlength - 1) + "…" : str; // мой код...
 }