diff --git a/javascript/04/async-assignment/multisort.js b/javascript/04/async-assignment/multisort.js
index c2eade5..2c4521c 100644
--- a/javascript/04/async-assignment/multisort.js
+++ b/javascript/04/async-assignment/multisort.js
@@ -1,4 +1,4 @@
-const fs = require('fs')
+const fs = require('fs');
 
 /**
  * create a file sorted.txt will all the numbers from 1.txt, 2.txt and 3.txt
@@ -11,3 +11,25 @@ const fs = require('fs')
  * 
  * NOTE: You can NOT use readFileSync or writeFileSync 
  */
+
+const getFilePath = fileName => __dirname + `/${fileName}`;
+const writeFileAsync = (fileName, data) => new Promise((resolve, reject) => {
+  fs.writeFile(getFilePath(fileName), data, err => err ? reject(err) : resolve(true));
+});
+const readFileAsync = fileName => new Promise((resolve, reject) => {
+  fs.readFile(getFilePath(fileName), (err, data) => err ? reject(err) : resolve(data.toString()));
+});
+
+const splitByNewline = str => str.split('\n').map(el => Number(el));
+const OUTPUT_FILE = 'sorted.txt';
+const FILES = ['1.txt', '2.txt', '3.txt'];
+const sortElementsInFiles = async () => {
+  const fileOneData = splitByNewline(await readFileAsync(FILES[0]));
+  const fileTwoData = splitByNewline(await readFileAsync(FILES[1]));
+  const fileThreeData = splitByNewline(await readFileAsync(FILES[2]));
+  const allFilesDataSorted = [...fileOneData, ...fileTwoData, ...fileThreeData].sort((a, b) => a - b);
+  const outputString = allFilesDataSorted.reduce((acc, currVal) => acc + currVal +'\n', '');
+  await writeFileAsync(OUTPUT_FILE, outputString);
+};
+
+(async () => await sortElementsInFiles())();
diff --git a/javascript/04/fizzbuzz/script.js b/javascript/04/fizzbuzz/script.js
index fbbbebc..39ab8c9 100644
--- a/javascript/04/fizzbuzz/script.js
+++ b/javascript/04/fizzbuzz/script.js
@@ -12,22 +12,61 @@ const ul = document.getElementById('fizzbuzz');
  * 1 2 fizz 4 buzz fizz 7 8 fizz buzz 11 fizz 13 14 fizzbuzz ..... 
  */
 
-print.onclick = function () {
-  const start = Date.now();
-  for (let i = 1; i <= count.value; i++) {
-    let li = document.createElement("li");
-    let text = "";
-    if (i % 3 == 0) {
-      text += "fizz";
-    }
-    if (i % 5 == 0) {
-      text += "buzz";
-    }
-    if (text === "") {
-      text = i;
+const FIZZ = 'fizz', BUZZ = 'buzz'
+function isDivisbleBy(denominator) {
+  return function (num) {
+    return (num % denominator) === 0;
+  }
+}
+
+const isDivisbleBy3 = isDivisbleBy(3);
+const isDivisbleBy5 = isDivisbleBy(5);
+
+if (print) {
+  print.onclick = function () {
+    const maxCount = Number(count.value);
+    const elementsToPrint = [];
+    for (let i = 1; i <= maxCount; ++i) {
+      if (isDivisbleBy3(i) && isDivisbleBy5(i)) {
+        elementsToPrint.push(FIZZ + BUZZ);
+      } else if (isDivisbleBy5(i)) {
+        elementsToPrint.push(FIZZ);
+      } else if (isDivisbleBy3(i)) {
+        elementsToPrint.push(BUZZ);
+      } else {
+        elementsToPrint.push(i);
+      }
     }
-    li.innerText = text;
-    ul.appendChild(li);
+  
+    fizzbuzz.innerHTML = '';
+    elementsToPrint.forEach(ele => {
+      const liElement = document.createElement('li');
+      liElement.innerHTML = ele;
+      fizzbuzz.appendChild(liElement);
+    });
   }
-  console.log('time = ', Date.now() - start);
-};
\ No newline at end of file
+}
+ 
+
+/**
+ * Assignment Solution by Instructor (Arnav)
+ */
+// print.onclick = function () {
+//   const start = Date.now();
+//   for (let i = 1; i <= count.value; i++) {
+//     let li = document.createElement("li");
+//     let text = "";
+//     if (i % 3 == 0) {
+//       text += "fizz";
+//     }
+//     if (i % 5 == 0) {
+//       text += "buzz";
+//     }
+//     if (text === "") {
+//       text = i;
+//     }
+//     li.innerText = text;
+//     ul.appendChild(li);
+//   }
+//   console.log('time = ', Date.now() - start);
+// };