diff --git a/isNumberPalindrome.js b/isNumberPalindrome.js
index 699a785..e60e300 100644
--- a/isNumberPalindrome.js
+++ b/isNumberPalindrome.js
@@ -32,3 +32,18 @@ const isNumberPalindrome = (number) => {
   return reversed === number;
 }
  */
+
+ const isNumberPalindrome = (number) => {
+  let numCopy = number;
+  let reversedNum = null;
+  let digit = null;
+
+  while (numCopy > 0){
+    digit = numCopy % 10;
+    reversedNum = reversedNum * 10 + digit;
+    numCopy = Math.floor(numCopy / 10);
+  }
+  return reversedNum === number;
+ }
+
+ 
diff --git a/longestCommonPrefix.js b/longestCommonPrefix.js
index 99bd9f6..bcd1175 100644
--- a/longestCommonPrefix.js
+++ b/longestCommonPrefix.js
@@ -39,3 +39,14 @@ const longestCommonPrefix = arrayOfStrings => {
         is empty)
  };
 */
+
+const longestCommonPrefix = (arr) => {
+	let longestCommonPrefix = arr[0];
+	for (let i = 1; i < arr.length; i++){
+		let str = arr[i];
+		while (str.indexOf(longestCommonPrefix) === -1){
+			longestCommonPrefix = longestCommonPrefix.slice(0,-1);
+		}
+	}
+	return longestCommonPrefix
+}
\ No newline at end of file