diff --git a/src/challenge.ts b/src/challenge.ts
index 63a7766..b1ce38c 100644
--- a/src/challenge.ts
+++ b/src/challenge.ts
@@ -9,6 +9,7 @@
 // logger<number | string>([1, 2, 3, "one", "two", "three"]);
 function logger<T>(array: T[]): void {
   // write your code here...
+  array.forEach((element)=>console.log(element))
 }
 
 // `toCelsius` function that:
@@ -19,8 +20,8 @@ function logger<T>(array: T[]): void {
 // toCelsius([32, 68, 100, 212]); // => [0, 20, 37.7778, 100]
 function toCelsius(temperatures: number[]): number[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  
+  return temperatures.map((temp)=>(temp - 32) * (5/9)); // replace empty array with what you see is fit
 }
 
 // `hottestDays` function that:
@@ -33,7 +34,7 @@ function toCelsius(temperatures: number[]): number[] {
 function hottestDays(temperatures: number[], threshold: number): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return temperatures.filter(temps=>temps>=threshold); // replace empty array with what you see is fit
 }
 
 // `logHottestDays` function that:
@@ -42,6 +43,7 @@ function hottestDays(temperatures: number[], threshold: number): number[] {
 // - Log temperatures that exceed the threshold to the console IN DEGREES CELSIUS  (hint: you can combine all previous functions)
 function logHottestDays(temperatures: number[], threshold: number): void {
   // write your code here...
+  logger(toCelsius(hottestDays(temperatures,threshold)))
 }
 
 export { logger, toCelsius, hottestDays, logHottestDays };
diff --git a/src/filtering.ts b/src/filtering.ts
index 49411d8..8c0d1a6 100644
--- a/src/filtering.ts
+++ b/src/filtering.ts
@@ -11,8 +11,8 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 // greaterThanTwentyFive(numbers); // => [38, 35, 40]
 function greaterThanTwentyFive(numbers: number[]): number[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+    let overtwentyfive = numbers.filter((num)=>num >= 25)
+  return overtwentyfive; // replace empty array with what you see is fit
 }
 
 // `divisibleByFive` function that:
@@ -23,7 +23,7 @@ function greaterThanTwentyFive(numbers: number[]): number[] {
 function divisibleByFive(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.filter((num)=>num%5===0); // replace empty array with what you see is fit
 }
 
 export { greaterThanTwentyFive, divisibleByFive };
diff --git a/src/mapping+filtering.ts b/src/mapping+filtering.ts
index 269ad83..7eb8d72 100644
--- a/src/mapping+filtering.ts
+++ b/src/mapping+filtering.ts
@@ -11,8 +11,8 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 // filteredAndSquared(numbers); // => [400, 625, 1444, 1225, 1600]
 function filteredAndSquared(numbers: number[]): number[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  
+  return numbers.filter((num)=>num >= 20).map((n)=>n*n); // replace empty array with what you see is fit
 }
 
 // `filteredAndTripled` function that:
@@ -23,7 +23,7 @@ function filteredAndSquared(numbers: number[]): number[] {
 function filteredAndTripled(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.filter((num)=>num%5 == 0).map((n)=>n*3);; // replace empty array with what you see is fit
 }
 
 export { filteredAndSquared, filteredAndTripled };
diff --git a/src/mapping.ts b/src/mapping.ts
index 6f18eef..df08cf9 100644
--- a/src/mapping.ts
+++ b/src/mapping.ts
@@ -11,8 +11,8 @@ const numbers = [10, 13, 20, 25, 38, 35, 40];
 // squaredNumbers(numbers); // => [100, 169, 400, 625, 1444, 1225, 1600]
 function squaredNumbers(numbers: number[]): number[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  const squares = numbers.map((number)=>number*number)
+  return squares; // replace empty array with what you see is fit
 }
 
 // `doubledNumbers` function that:
@@ -23,7 +23,7 @@ function squaredNumbers(numbers: number[]): number[] {
 function doubledNumbers(numbers: number[]): number[] {
   // write your code here...
 
-  return []; // replace empty array with what you see is fit
+  return numbers.map((number)=>number*2); // replace empty array with what you see is fit
 }
 
 export { squaredNumbers, doubledNumbers };