diff --git a/Exercises/1-let.js b/Exercises/1-let.js
index d705443..011cc55 100644
--- a/Exercises/1-let.js
+++ b/Exercises/1-let.js
@@ -1,5 +1,5 @@
 'use strict';
 
-let name = undefined;
+let name = 'Michil';
 
 module.exports = { name };
diff --git a/Exercises/2-const.js b/Exercises/2-const.js
index 5512738..0041b5a 100644
--- a/Exercises/2-const.js
+++ b/Exercises/2-const.js
@@ -1,5 +1,5 @@
 'use strict';
 
-const year = undefined;
+const year = 2000;
 
 module.exports = { year };
diff --git a/Exercises/3-hello.js b/Exercises/3-hello.js
index a597391..17b496b 100644
--- a/Exercises/3-hello.js
+++ b/Exercises/3-hello.js
@@ -1,5 +1,5 @@
 'use strict';
 
-const hello = null;
+const hello = (name) => console.log(`Привет, ${name}`);
 
 module.exports = { hello };
diff --git a/Exercises/4-range.js b/Exercises/4-range.js
index 31bd852..b78da6f 100644
--- a/Exercises/4-range.js
+++ b/Exercises/4-range.js
@@ -1,5 +1,10 @@
 'use strict';
 
-const range = null;
-
+const range = (start, end) => {
+  const massiv = [];
+  for (start; start <= end; start++) {
+    massiv.push(start);
+  }
+  return massiv;
+};
 module.exports = { range };
diff --git a/Exercises/5-range-odd.js b/Exercises/5-range-odd.js
index 54bb5b4..db88eb4 100644
--- a/Exercises/5-range-odd.js
+++ b/Exercises/5-range-odd.js
@@ -1,5 +1,11 @@
 'use strict';
 
-const rangeOdd = null;
+const rangeOdd = (start, end) => {
+  const massiv = [];
+  for (start; start <= end; start++) {
+    if (start % 2 !== 0) massiv.push(start);
+  }
+  return massiv;
+};
 
 module.exports = { rangeOdd };
diff --git a/Exercises/6-calculate.js b/Exercises/6-calculate.js
index dfecf6b..8be7dc0 100644
--- a/Exercises/6-calculate.js
+++ b/Exercises/6-calculate.js
@@ -1,11 +1,19 @@
 'use strict';
 
-const square = null;
+const square = (x) => x * x;
 
-const cube = null;
+const cube = (x) => x ** 3;
 
-const average = null;
+const average = (a, b) => (a + b) / 2;
 
-const calculate = null;
+const calculate = () => {
+  const massiv = [];
+  for (let i = 0; i <= 9; i++) {
+    const znach1 = cube(i);
+    const znach2 = square(i);
+    massiv.push(average(znach1, znach2));
+  }
+  return massiv;
+};
 
 module.exports = { square, cube, average, calculate };
diff --git a/Exercises/7-objects.js b/Exercises/7-objects.js
index 0920026..ccc85e3 100644
--- a/Exercises/7-objects.js
+++ b/Exercises/7-objects.js
@@ -1,5 +1,17 @@
 'use strict';
 
-const fn = null;
+const fn = () => {
+  const kek = { name: 'mich' };
+  let lol = {
+    name: 'lyalya',
+  };
+  kek.name = 'dada';
+  lol.name = 'xoxoox';
+  console.log(kek.name);
+  console.log(lol.name);
+  lol = { dada: 'asdsadsad' };
+};
+
+fn();
 
 module.exports = { fn };
diff --git a/Exercises/8-create.js b/Exercises/8-create.js
index ac27ddd..52d3503 100644
--- a/Exercises/8-create.js
+++ b/Exercises/8-create.js
@@ -1,5 +1,8 @@
 'use strict';
 
-const createUser = null;
+const createUser = (name, city) => {
+  const user = { name, city };
+  return user;
+};
 
 module.exports = { createUser };
diff --git a/Exercises/9-array.js b/Exercises/9-array.js
index 466c69a..33f9ab4 100644
--- a/Exercises/9-array.js
+++ b/Exercises/9-array.js
@@ -1,7 +1,13 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = [{ name: 'Michil', phone: '+79143053718' },
+  { name: 'Lyulya', phone: '+79969156656' }];
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => {
+  for (const nam of phonebook) {
+    if (nam.name === name) return nam.phone;
+  }
+};
+findPhoneByName('Lyulya');
 
 module.exports = { phonebook, findPhoneByName };
diff --git a/Exercises/a-hash.js b/Exercises/a-hash.js
index 466c69a..2f85bf2 100644
--- a/Exercises/a-hash.js
+++ b/Exercises/a-hash.js
@@ -1,7 +1,11 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = {
+  mich: '+79143053718',
+  lyalya: '+79969156656',
+};
+
+const findPhoneByName = (name) => phonebook(name);
 
-const findPhoneByName = null;
 
 module.exports = { phonebook, findPhoneByName };