diff --git a/src/advanced/advanced.js b/src/advanced/advanced.js
index 8b2b193..8eee935 100644
--- a/src/advanced/advanced.js
+++ b/src/advanced/advanced.js
@@ -6,20 +6,61 @@ const nums = [1, 10, 3, 9, 4, 8, 5, 7, 6, 2, -5, -2, -4, -9] // eslint-disable-l
 let hasTen = false
 let indexOfTen = -1
 
+for (let i = 0; i <= nums.length; i++) {
+  if (nums[i] === 10) {
+    hasTen = true
+    indexOfTen = i
+    break
+  }
+}
+
 // 2. Use a for loop to count how many numbers in the array are divisible by 3
 let divisibleByThreeCount = 0
 
+nums.forEach((num) => {
+  if (num % 3 === 0) {
+    divisibleByThreeCount++
+  }
+})
+
 // 3. use a for loop to find the average of the numbers in the array
 let average = 0
 
+nums.forEach((num) => {
+  average += num
+})
+
+average = average / nums.length
+
 // 4. use a for loop to find the largest number in the array
-let largest = 0
+let largest = nums[0]
+
+for (let i = 1; i < nums.length; i++) {
+  if (largest < nums[i]) {
+    largest = nums[i]
+  }
+}
 
 // 5. use a for loop to find the smallest number in the array
-let smallest = 100000
+let smallest = nums[0]
+
+for (let i = 0; i < nums.length; i++) {
+  if (smallest > nums[i]) {
+    smallest = nums[i]
+  }
+}
 
 // 6. find the median of the numbers in the array
 let median = 0
+nums.sort((a, b) => a - b)
+
+const middle = Math.floor(nums.length / 2)
+
+if (nums.length % 2 === 0) {
+  median = nums[middle - 1]
+} else {
+  median = nums[middle]
+}
 
 module.exports = {
   hasTen,
diff --git a/src/extensions/nested-loops.js b/src/extensions/nested-loops.js
index 1d0044b..ff31fbe 100644
--- a/src/extensions/nested-loops.js
+++ b/src/extensions/nested-loops.js
@@ -17,20 +17,101 @@ const deepThree = []
 // Your code here
 // }
 
+for (let i = START; i <= END; i++) {
+  simpleOne.push(i)
+}
+
+console.log(simpleOne)
+
 // 2. Using nested for loops, add arrays to 'nestedOne' where each array has n copies of the outer 'loop index'
 //    eg [[1],[2,2],...]
 
+for (let i = START; i <= END; i++) {
+  const innerArray = []
+
+  for (let j = 0; j < i; j++) {
+    innerArray.push(i)
+  }
+
+  nestedOne.push(innerArray)
+}
+
+console.log(nestedOne)
+
 // 3. As 2, but each array should contain the values from the outer 'loop index' to 1 inclusive. Update array 'nestedTwo'
 //    eg [[1],[2,1],...]
 
+for (let i = START; i <= END; i++) {
+  const innerArray = []
+
+  for (let j = i; j >= 1; j--) {
+    innerArray.push(j)
+  }
+
+  nestedTwo.push(innerArray)
+}
+
+console.log(nestedTwo)
+
 // 4. As 2, but each array should contain arrays from 1 to the outer 'loop index' with the value of the outer 'loop index'. Update array 'deepOne'
 //    eg [[[1]],[[2],[2,2]],...]
+for (let i = START; i <= END; i++) {
+  const outerArray = []
+
+  for (let j = 1; j <= i; j++) {
+    const innerArray = []
+
+    for (let k = 1; k <= j; k++) {
+      innerArray.push(i)
+    }
+
+    outerArray.push(innerArray)
+  }
+
+  deepOne.push(outerArray)
+}
 
 // 5. As 4, update array 'deepTwo' so that the result is:
 //       [[[1]],[[1],[1,2]],...]
 
+for (let i = START; i <= END; i++) {
+  const outerArray = []
+
+  for (let j = 1; j <= i; j++) {
+    const innerArray = []
+
+    for (let k = 1; k <= j; k++) {
+      innerArray.push(k)
+    }
+
+    outerArray.push(innerArray)
+  }
+
+  deepTwo.push(outerArray)
+}
+
 // 6. As 5, update the array 'deepThree', but the result should be the average of the sum of the squares of the numbers in each array
 //       [[1],[[1],[2.5]],...]
+for (let i = START; i <= END; i++) {
+  const outerArray = []
+
+  for (let j = 1; j <= i; j++) {
+    let sumOfSquares = 0
+
+    // Sum the squares of numbers from 1 to j
+    for (let k = 1; k <= j; k++) {
+      sumOfSquares += k * k
+    }
+
+    // Calculate the average of the sum of the squares
+    const average = [sumOfSquares / j]
+
+    // Push the average value instead of the array of numbers
+    outerArray.push(average)
+  }
+
+  deepThree.push(outerArray)
+}
 
 module.exports = {
   START,
diff --git a/src/for-loop-and-arrays.js b/src/for-loop-and-arrays.js
index 6635155..f27dc16 100644
--- a/src/for-loop-and-arrays.js
+++ b/src/for-loop-and-arrays.js
@@ -6,18 +6,46 @@ let word = '' // eslint-disable-line prefer-const
 // TODO: Add code below this line to make the tests pass
 
 // 1. Use a for loop to set the sum variable to the sum of all the values in nums
+nums.forEach((element) => {
+  sum += element
+})
+
+console.log(sum)
 
 // 2. Use a for loop to populate doubledNums with every value from nums array doubled (i.e [2, 6, 24, etc...])
 const doubledNums = []
 
+nums.forEach((element) => {
+  doubledNums.push(element * 2)
+})
+
+console.log(doubledNums)
+
 // 3. Use a for loop to set word variable equal to all the letters in the letters array combined as a single string
+letters.forEach((letter) => {
+  word += letter
+})
+
+console.log(word)
 
 // 4. Use a for loop to populate everySecondNum with every second number from the nums array
 const everySecondNum = []
 
+for (let i = 1; i < nums.length; i += 2) {
+  everySecondNum.push(nums[i])
+}
+
+console.log(everySecondNum)
+
 // 5. Use a for loop to populate numsReversed with the numbers from nums in reverse order
 const numsReversed = []
 
+for (let i = nums.length - 1; i >= 0; i--) {
+  numsReversed.push(nums[i])
+}
+
+console.log(numsReversed)
+
 // do not change below this line
 module.exports = {
   a: sum,
diff --git a/src/for-loop-basic.js b/src/for-loop-basic.js
index dc3775a..6b87c1f 100644
--- a/src/for-loop-basic.js
+++ b/src/for-loop-basic.js
@@ -4,12 +4,24 @@ const evenNums = []
 const countdown = []
 
 // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
+for (let i = 0; i <= 3; i++) numsZeroToThree.push(i)
+
+console.log(numsZeroToThree)
 
 // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
+for (let i = 5; i <= 10; i++) numsFiveToTen.push(i)
+
+console.log(numsFiveToTen)
 
 // TODO: 3. Write a for loop that adds all the even numbers between 0 and 6 (0, 2, 4, 6) to evenNums
+for (let i = 0; i <= 6; i++) if (i % 2 === 0) evenNums.push(i)
+
+console.log(evenNums)
 
 // TODO: 4. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
+for (let i = 3; i >= 0; i--) countdown.push(i)
+
+console.log(countdown)
 
 // do not change below this line
 module.exports = {