diff --git a/problems/countNumbers.js b/problems/countNumbers.js
index 3a86643..f1a2fc2 100644
--- a/problems/countNumbers.js
+++ b/problems/countNumbers.js
@@ -12,8 +12,17 @@
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
 
-function countNumbers() {
- 
+function countNumbers(arr) {
+    let mapped = {}
+    for (let i = 0; i < arr.length; i++) {
+        if (mapped[arr[i]] === undefined) {
+            mapped[arr[i]] = 1
+        }
+        else {
+            mapped[arr[i]] += 1
+        }
+    }
+    return mapped
 }
 
 
diff --git a/problems/getCountriesSortedByPopulation.js b/problems/getCountriesSortedByPopulation.js
index 6e73ba8..e34ce47 100644
--- a/problems/getCountriesSortedByPopulation.js
+++ b/problems/getCountriesSortedByPopulation.js
@@ -10,8 +10,13 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+function getCountriesSortedByPopulation(arr) {
+let newArr = []
+arr.sort((a,b) => b.population - a.population)
+for(let i = 0; i< arr.length; i++){
+    newArr.push(arr[i].country)
+}
+return newArr
 }
 
 module.exports = getCountriesSortedByPopulation
diff --git a/problems/isOdd.js b/problems/isOdd.js
index e93efee..a2ff141 100644
--- a/problems/isOdd.js
+++ b/problems/isOdd.js
@@ -9,8 +9,13 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+if(n % 2 ===0){
+    return false
+}
+else{
+    return true
+}
 }
 
 module.exports = isOdd
diff --git a/problems/numberOfDigits.js b/problems/numberOfDigits.js
index a90ca53..a1d6641 100644
--- a/problems/numberOfDigits.js
+++ b/problems/numberOfDigits.js
@@ -7,8 +7,8 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+    return n.toString().length
 }
 
 module.exports = numberOfDigits
diff --git a/problems/removeEvenStrings.js b/problems/removeEvenStrings.js
index b5e8052..b517405 100644
--- a/problems/removeEvenStrings.js
+++ b/problems/removeEvenStrings.js
@@ -19,8 +19,17 @@
 * returns: []
 */
 
-function removeEvenStrings() {
+function removeEvenStrings(arr) {
+let newArr = []
+for(let i = 0; i < arr.length; i++){
+    if(arr[i].length % 2 === 0){
 
+    }
+    else{
+        newArr.push(arr[i])
+    }
+}
+return newArr
 }
 
 module.exports = removeEvenStrings
diff --git a/problems/removeNumbersAtOddIndices.js b/problems/removeNumbersAtOddIndices.js
index 94d03a0..d269704 100644
--- a/problems/removeNumbersAtOddIndices.js
+++ b/problems/removeNumbersAtOddIndices.js
@@ -10,8 +10,12 @@
 * ex: removeNumbersAtOddIndices([5, 4, 3, 2, 1]);
 * returns: [5, 3, 1]
 */
-function removeNumbersAtOddIndices() {
-
+function removeNumbersAtOddIndices(arr) {
+let newArr = []
+for(let i = 0; i < arr.length;i+=2){
+    newArr.push(arr[i])
+}
+return newArr
 }
 
 module.exports = removeNumbersAtOddIndices
\ No newline at end of file
diff --git a/problems/removeOddNumbers.js b/problems/removeOddNumbers.js
index cbfe4eb..853c3e6 100644
--- a/problems/removeOddNumbers.js
+++ b/problems/removeOddNumbers.js
@@ -14,8 +14,14 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
-
+function removeOddNumbers(arr) {
+let newArr = []
+for(let i =0;i< arr.length;i++){
+    if(arr[i] % 2 === 0){
+        newArr.push(arr[i])
+    }
+}
+return newArr
 }
 
 module.exports = removeOddNumbers
\ No newline at end of file
diff --git a/problems/removeVowels.js b/problems/removeVowels.js
index be7edc6..610a3e9 100644
--- a/problems/removeVowels.js
+++ b/problems/removeVowels.js
@@ -14,8 +14,18 @@
 *
 */
 
-function removeVowels() {
-
+function removeVowels(str) {
+    let newString = ''
+    for (let i = 0; i < str.length; i++) {
+      if (str[i].toLocaleLowerCase() !== 'a' && str[i].toLocaleLowerCase() !== 'e' && str[i].toLocaleLowerCase() !== 'i' && str[i].toLocaleLowerCase() !== 'o' && str[i].toLocaleLowerCase() !== 'u' ){
+        newString +=str[i]
+      }
+      
+      
+    
+   
+}
+return newString
 }
 
 module.exports = removeVowels
diff --git a/problems/sevenBoom.js b/problems/sevenBoom.js
index a77a8f9..fe64683 100644
--- a/problems/sevenBoom.js
+++ b/problems/sevenBoom.js
@@ -11,8 +11,18 @@
 * 17 is also replaced with 'BOOM' because it contains a 7.
 */
 
-function sevenBoom() {
-
+function sevenBoom(n) {
+    let newArr = []
+    for(let i = 1; i <= n;i++){
+        if(i % 7 === 0 || i% 10 === 7){
+            newArr.push('BOOM')
+        }
+        else{
+            newArr.push(i)
+        }
+        
+    }
+       return newArr
 }
 
 module.exports = sevenBoom
\ No newline at end of file
diff --git a/problems/smallest.js b/problems/smallest.js
index 931bf25..6af6566 100644
--- a/problems/smallest.js
+++ b/problems/smallest.js
@@ -14,8 +14,15 @@
 * returns 1 (does not matter if it is the first or second 1)
 */
 
-function smallest() {
-  
+function smallest(arr) {
+    let smallest = arr[0]
+    for(let i= 0;i< arr.length;i++){
+        if(arr[i] < smallest){
+           smallest = arr[i]
+        }
+    }
+    return smallest
 }
+console.log(smallest([5, 1, 4, 2, 5, 6]))
 
 module.exports = smallest