diff --git a/js/findLongestWord.js b/js/findLongestWord.js
new file mode 100644
index 0000000..d7c35c7
--- /dev/null
+++ b/js/findLongestWord.js
@@ -0,0 +1,13 @@
+function findLongestWord(array) {
+  var maxLength = 0;
+  var maxWord;
+  for (var i=0; i<array.length;i++) {
+    if (array[i].length > maxLength) {
+      maxLength = array[i].length;
+      // console.log(array[i]);
+    }
+  }
+  return maxLength;
+}
+
+console.log(findLongestWord(["icroscopicsilicovolcanoconiosis","hello","again"]));
diff --git a/js/isCharacterAVowel.js b/js/isCharacterAVowel.js
new file mode 100644
index 0000000..2c97365
--- /dev/null
+++ b/js/isCharacterAVowel.js
@@ -0,0 +1,7 @@
+function isCharacterAVowel(char) {
+  var vowels = "aeiouAEIOU";
+  if (vowels.includes(char)) return true;
+  return false;
+}
+
+console.log(isCharacterAVowel('z'));
diff --git a/js/isPrime.js b/js/isPrime.js
index e69de29..d940d69 100644
--- a/js/isPrime.js
+++ b/js/isPrime.js
@@ -0,0 +1,11 @@
+function isPrime(num) {
+  if (num <= 1) return false;
+  if (num == 2) return true;
+  if (num%2 == 0) return false;
+  for (var i=3; i*i < num; i+= 2) {
+    if (num%i == 0) return false;
+  }
+  return true;
+}
+
+console.log(isPrime(6));
diff --git a/js/letterCount.js b/js/letterCount.js
index e69de29..28bbf8c 100644
--- a/js/letterCount.js
+++ b/js/letterCount.js
@@ -0,0 +1,18 @@
+function letterCount(str) {
+  var dict = {};
+  var re = /^[a-zA-Z_0-9]$/; // ignore spaces and punctuation
+  for (var i=0;i<str.length;i++) {
+    if (re.test(str.charAt(i))) {
+      var char = str.charAt(i).toLowerCase();
+      if (dict[char] == null) dict[char] = 0;
+      dict[char]++;
+    }
+
+  }
+
+  for (var pair in dict) {
+    console.log(pair + " - " + dict[pair]);
+  }
+}
+
+letterCount("helloHE LLO !1234");
diff --git a/js/maxOfThree.js b/js/maxOfThree.js
new file mode 100644
index 0000000..2ccc3a3
--- /dev/null
+++ b/js/maxOfThree.js
@@ -0,0 +1,12 @@
+function maxOfThree(num1, num2, num3) {
+  var max;
+  if (num1 > num2) max = num1;
+  else max = num2;
+
+  if (max > num3) return max;
+  else return num3;
+
+  // return Math.max(num1,num2,num3);
+}
+
+console.log(maxOfThree(1,2,3));
diff --git a/js/merge.js b/js/merge.js
index e69de29..ea25822 100644
--- a/js/merge.js
+++ b/js/merge.js
@@ -0,0 +1,6 @@
+function merge(array1, array2) {
+  var merged = array1.concat(array2);
+  return merged.sort(function(a,b){return a-b;});
+}
+
+console.log(merge([2,3,4,10],[6,9,100]))
diff --git a/js/primes.js b/js/primes.js
index e69de29..acaa874 100644
--- a/js/primes.js
+++ b/js/primes.js
@@ -0,0 +1,27 @@
+function isPrime(num) {
+  if (num <= 1) return false;
+  if (num == 2) return true;
+  if (num%2 == 0) return false;
+  for (var i=3; i*i < num; i+= 2) {
+    if (num%i == 0) return false;
+  }
+  return true;
+};
+
+function primes(max) {
+  if (max == 0) return [];
+  var res = [2];
+  if (max == 1) return res;
+  var num = 3;
+  while (max > 1) {
+    if (isPrime(num)) {
+      res.push(num);
+      max--;
+    }
+    num += 2;
+  }
+
+  return res;
+}
+
+console.log(primes(15));
diff --git a/js/sillySum.js b/js/sillySum.js
index e69de29..ee06845 100644
--- a/js/sillySum.js
+++ b/js/sillySum.js
@@ -0,0 +1,7 @@
+function sillySum(arr) {
+  var sum = 0;
+  for (var i=0;i<arr.length;i++) sum += arr[i] * i;
+  return sum;
+}
+
+console.log(sillySum([1,2,3,4, 5]));
diff --git a/js/sumArray.js b/js/sumArray.js
new file mode 100644
index 0000000..8ba099b
--- /dev/null
+++ b/js/sumArray.js
@@ -0,0 +1,8 @@
+
+function sumArray(arr) {
+  var sum = 0;
+  for (var i=0;i<arr.length;i++) sum += arr[i];
+  return sum;
+}
+
+console.log(sumArray([1,2,3,4]));