diff --git a/solutions/averageAgeOfAdults.js b/solutions/averageAgeOfAdults.js
index c52b813..61ff15b 100644
--- a/solutions/averageAgeOfAdults.js
+++ b/solutions/averageAgeOfAdults.js
@@ -15,8 +15,26 @@ You do not have to deal with the case, when there are only underage users in the
 
 */
 
-function averageAgeOfAdults(users) {
+// let users = {
+//   "id": 123,
+//   "name": "Alex Smith",
+//   "age": 20,
+// }
 
+function averageAgeOfAdults(users) {
+  let numberOfAdults = 0;
+  let sumOfAdultAges = 0;
+  for (let person of users){
+    if (parseInt(person.age) >= 18){
+      numberOfAdults += 1;
+      sumOfAdultAges += parseInt(person.age);
+    }
+  }
+  let result = sumOfAdultAges / numberOfAdults;
+  // console.log(result);
+  return result
 }
 
+// console.log(averageAgeOfAdults(users));
+
 module.exports = averageAgeOfAdults;
diff --git a/solutions/countConfirmed.js b/solutions/countConfirmed.js
index 240f926..9828166 100644
--- a/solutions/countConfirmed.js
+++ b/solutions/countConfirmed.js
@@ -15,7 +15,19 @@ If you receive an array which contains only one user object where the isConfirme
 */
 
 function countConfirmed(users) {
+  
+  if (users.length === 1 && users[0]["isConfirmed"] === true){
+    return 1;
+  }
 
+  let count = 0;
+  for (let user of users){
+    if (user.isConfirmed === true){
+      count += 1;
+    }
+  }
+  
+  return count;
 }
 
 module.exports = countConfirmed;
diff --git a/solutions/filterDivisible.js b/solutions/filterDivisible.js
index 308c21f..a1f851d 100644
--- a/solutions/filterDivisible.js
+++ b/solutions/filterDivisible.js
@@ -8,7 +8,23 @@ Be mindful of division by 0. If the given number is 0 then return null.
 If the array is empty then it should return an empty array.
  */
 
+// let numbers = [1,2,3,4,5,6,7,8,9,10];
+// let divisor = 3;
+
 function filterDivisible(numbers, divisor) {
+    let arrayOfDivisibles = [];
+    if (numbers.length < 1){
+        return arrayOfDivisibles;
+    } else if (divisor === 0){
+        return null;
+    } 
+    
+    for (let number of numbers){
+        if ((number % divisor) === 0){
+            arrayOfDivisibles.push(number);
+        }
+    }
+    return arrayOfDivisibles;
 
 }
 
diff --git a/solutions/findAbacus.js b/solutions/findAbacus.js
index d337e41..78981bd 100644
--- a/solutions/findAbacus.js
+++ b/solutions/findAbacus.js
@@ -12,7 +12,12 @@ The wrong object may contain the key abacus but with false value! There may only
 */
 
 function findAbacus(array) {
-
+    for (let index = 0; index < array.length; index++){
+        if (`abacus` in array[index] === true && array[index]["abacus"] === true){
+            return index;
+        }
+    }
+    return null;
 }
 
 module.exports = findAbacus;