diff --git a/Sprint-3/1-key-implement/1-get-angle-type.js b/Sprint-3/1-key-implement/1-get-angle-type.js
index 08d1f0cba..78c1509de 100644
--- a/Sprint-3/1-key-implement/1-get-angle-type.js
+++ b/Sprint-3/1-key-implement/1-get-angle-type.js
@@ -1,56 +1,44 @@
-// Implement a function getAngleType
-// Build up your function case by case, writing tests as you go
-// The first test and case is written for you. The next case has a test, but no code.
-// Execute this script in your terminal
-// node 1-get-angle-type.js
-// The assertion error will tell you what the expected output is
-// Write the code to pass the test
-// Then, write the next test! :) Go through this process until all the cases are implemented
-
 function getAngleType(angle) {
    if (angle === 90) return "Right angle";
-   // read to the end, complete line 36, then pass your test here
-}
+   if(angle<90) return "Acute angle";
+   if(angle>90 && angle<180) return "Obtuse angle";
+   if(angle === 180) return "Straight angle"
+   if (angle>180 && angle <360) return "Reflex angle"
 
-// we're going to use this helper function to make our assertions easier to read
-// if the actual output matches the target output, the test will pass
-function assertEquals(actualOutput, targetOutput) {
-  console.assert(
-    actualOutput === targetOutput,
-    `Expected ${actualOutput} to equal ${targetOutput}`
-  );
+   // read to the end, complete line 36, then pass your test here
 }
 
+	
 // Acceptance criteria:
-
 // Given an angle in degrees,
 // When the function getAngleType is called with this angle,
 // Then it should:
-
 // Case 1: Identify Right Angles:
 // When the angle is exactly 90 degrees,
 // Then the function should return "Right angle"
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
-
 // Case 2: Identify Acute Angles:
 // When the angle is less than 90 degrees,
 // Then the function should return "Acute angle"
 const acute = getAngleType(45);
 assertEquals(acute, "Acute angle");
-
 // Case 3: Identify Obtuse Angles:
 // When the angle is greater than 90 degrees and less than 180 degrees,
 // Then the function should return "Obtuse angle"
 const obtuse = getAngleType(120);
+assertEquals(obtuse, "Obtuse angle");
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
 // ====> write your test here, and then add a line to pass the test in the function above
-
+const straightangle = getAngleType(180)
+assertEquals(straightangle, "Straight angle")
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
-// ====> write your test here, and then add a line to pass the test in the function above
\ No newline at end of file
+// ====> write your test here, and then add a line to pass the test in the function above
+const reflexangle = getAngleType(250)
+assertEquals(reflexangle, "Reflex angle")
\ No newline at end of file
diff --git a/Sprint-3/1-key-implement/2-is-proper-fraction.js b/Sprint-3/1-key-implement/2-is-proper-fraction.js
index 91583e941..6b3098a42 100644
--- a/Sprint-3/1-key-implement/2-is-proper-fraction.js
+++ b/Sprint-3/1-key-implement/2-is-proper-fraction.js
@@ -40,6 +40,7 @@ assertEquals(improperFraction, false);
 // target output: true
 // Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true.
 const negativeFraction = isProperFraction(-4, 7);
+assertEquals(negativeFraction, true);
 // ====> complete with your assertion
 
 // Equal Numerator and Denominator check:
@@ -47,7 +48,8 @@ const negativeFraction = isProperFraction(-4, 7);
 // target output: false
 // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
 const equalFraction = isProperFraction(3, 3);
+assertEquals(equalFraction, false);
 // ====> complete with your assertion
 
 // Stretch:
-// What other scenarios could you test for?
+// What other scenarios could you test for?
\ No newline at end of file
diff --git a/Sprint-3/1-key-implement/3-get-card-value.js b/Sprint-3/1-key-implement/3-get-card-value.js
index aa1cc9f90..35432d7cc 100644
--- a/Sprint-3/1-key-implement/3-get-card-value.js
+++ b/Sprint-3/1-key-implement/3-get-card-value.js
@@ -1,3 +1,4 @@
+
 // This problem involves playing cards: https://en.wikipedia.org/wiki/Standard_52-card_deck
 
 // You will need to implement a function getCardValue
@@ -7,10 +8,18 @@
 // complete the rest of the tests and cases
 // write one test at a time, and make it pass, build your solution up methodically
 // just make one change at a time -- don't rush -- programmers are deep and careful thinkers
-function getCardValue(card) {
-    if (rank === "A") return 11;
-}
 
+  function getCardValue(card) {
+  const rankChar = card.slice(0, -1); // Remove the last character (suit)
+  const rankInt = parseInt(rankChar); // Try to convert rank to a number
+
+  if (rankChar === "A") return 11; // Ace is worth 11
+  else if (["K", "Q", "J"].includes(rankChar)) return 10; // Face cards worth 10
+  else if (rankInt >= 2 && rankInt <= 10) return rankInt; // 2–10 cards
+  else throw new Error("Invalid card rank.");
+}
+      
+  
 // You need to write assertions for your function to check it works in different cases
 // we're going to use this helper function to make our assertions easier to read
 // if the actual output matches the target output, the test will pass
@@ -30,22 +39,38 @@ assertEquals(aceofSpades, 11);
 
 // Handle Number Cards (2-10):
 // Given a card with a rank between "2" and "9",
-// When the function is called with such a card,
+// When the function is called
+//  with such a card,
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
+assertEquals(fiveofHearts, 5)
+const sixofHearts = getCardValue("6♥");
+assertEquals(sixofHearts, 6)
+
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Handle Face Cards (J, Q, K):
 // Given a card with a rank of "10," "J," "Q," or "K",
 // When the function is called with such a card,
 // Then it should return the value 10, as these cards are worth 10 points each in blackjack.
-
+const facecards = getCardValue("Q♥")
+assertEquals(facecards, 10)
 // Handle Ace (A):
 // Given a card with a rank of "A",
 // When the function is called with an Ace,
 // Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.
 
+const ace = getCardValue("A♥")
+assertEquals(ace, 11)
 // Handle Invalid Cards:
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
 // Then it should throw an error indicating "Invalid card rank."
+function assertThrowsInvalidCard(fn) {
+  try {
+    fn();
+    console.assert(false, "Expected error for invalid card rank");
+  } catch (error) {
+    assertEquals(error.message, "Invalid card rank.");
+  }
+}
\ No newline at end of file
diff --git a/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js b/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js
index d61254bd7..f771193a6 100644
--- a/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js
+++ b/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js
@@ -1,7 +1,11 @@
-function getAngleType(angle) {
+function getAngleType(angle)  {
+  if (angle <= 0 || angle >= 360) return "Invalid angle";
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  if (angle < 90) return "Acute angle";
+  if (angle > 90 && angle < 180) return "Obtuse angle";
+  if (angle === 180) return "Straight angle";
+  if (angle > 180 && angle < 360) return "Reflex angle";
+  return "Invalid angle"; 
 }
 
 
@@ -10,7 +14,6 @@ function getAngleType(angle) {
 
 
 
-
 // Don't get bogged down in this detail
 // Jest uses CommonJS module syntax by default as it's quite old
 // We will upgrade our approach to ES6 modules in the next course module, so for now 
diff --git a/Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js b/Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js
index b62827b7c..b220deb6d 100644
--- a/Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js
+++ b/Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js
@@ -1,10 +1,59 @@
 const getAngleType = require("./1-get-angle-type");
 
-test("should identify right angle (90°)", () => {
+  /*test("should identify right angle (90°)", () => {
+  expect(getAngleType(90)).toEqual("Right angle");});
+
+  test("should identify acute angle (45°)", () => {
+  expect(getAngleType(45)).toEqual("Acute angle");});
+
+  test("should identify obtuse angle (120°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");});
+
+  test("should identify straight angle (180°)", () => {
+  expect(getAngleType(180)).toEqual("Straight angle");});
+
+  test("should identify reflex angle (220°)", () => {
+  expect(getAngleType(220)).toEqual("Reflex angle");});
+
+  */
+ test("should identify right angle (angle === 90)", () => {
   expect(getAngleType(90)).toEqual("Right angle");
 });
 
-// REPLACE the comments with the tests
+test("should identify acute angle (angle < 90)", () => {
+  expect(getAngleType(45)).toEqual("Acute angle");
+  expect(getAngleType(30)).toEqual("Acute angle");
+  expect(getAngleType(0.1)).toEqual("Acute angle");
+});
+
+test("should identify obtuse angle (90 < angle < 180)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(135)).toEqual("Obtuse angle");
+  expect(getAngleType(179.9)).toEqual("Obtuse angle");
+});
+
+test("should identify straight angle (angle === 180)", () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
+test("should identify reflex angle (180 < angle < 360)", () => {
+  expect(getAngleType(220)).toEqual("Reflex angle");
+  expect(getAngleType(300)).toEqual("Reflex angle");
+  expect(getAngleType(359.999)).toEqual("Reflex angle");
+  expect(getAngleType(180.001)).toEqual("Reflex angle");
+});
+
+test("should return 'Invalid angle' for invalid inputs", () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-45)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+  expect(getAngleType("90")).toEqual("Invalid angle");
+  expect(getAngleType(NaN)).toEqual("Invalid angle");
+});
+
+
+
 // make your test descriptions as clear and readable as possible
 
 // Case 2: Identify Acute Angles:
@@ -21,4 +70,4 @@ test("should identify right angle (90°)", () => {
 
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
-// Then the function should return "Reflex angle"
+// Then the function should return "Reflex angle"
\ No newline at end of file
diff --git a/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js b/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js
index 9836fe398..a06524575 100644
--- a/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js
+++ b/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js
@@ -1,6 +1,6 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+    
+   if (denominator === 0) throw new Error("Denominator cannot be zero");
+    return Math.abs(numerator) < Math.abs(denominator);
 }
-
 module.exports = isProperFraction;
\ No newline at end of file
diff --git a/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js b/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js
index ff1cc8173..74f80d565 100644
--- a/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js
+++ b/Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js
@@ -3,9 +3,13 @@ const isProperFraction = require("./2-is-proper-fraction");
 test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
+test("should return false for a proper fraction", () => {
+  expect(isProperFraction(5, 3)).toEqual(false);
+});
 
-// Case 2: Identify Improper Fractions:
-
-// Case 3: Identify Negative Fractions:
-
-// Case 4: Identify Equal Numerator and Denominator:
+test("should return true for a negative fraction", () => {
+  expect(isProperFraction(-4, -6)).toEqual(true);
+});
+test("should return false for a equal fraction", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
\ No newline at end of file
diff --git a/Sprint-3/2-mandatory-rewrite/3-get-card-value.js b/Sprint-3/2-mandatory-rewrite/3-get-card-value.js
index 0d95d3736..5c26358a5 100644
--- a/Sprint-3/2-mandatory-rewrite/3-get-card-value.js
+++ b/Sprint-3/2-mandatory-rewrite/3-get-card-value.js
@@ -1,5 +1,15 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+  const rankChar = card.slice(0, -1)
+
+  if (rankChar === "A") return 11; //If rank is 'A' (Ace), return 11 points
+  if (["K", "Q", "J"].includes(rankChar)) return 10; //// If rank is 'K', 'Q', or 'J' (King, Queen, Jack), return 10 points
+
+  const validRanks = ["2", "3", "4", "5", "6", "7", "8", "9", "10"];
+  if (validRanks.includes(rankChar)) return Number(rankChar); // Define all valid numeric ranks as strings
+
+  throw new Error("Invalid card rank.");//If none of the above conditions match, the card rank is invalid, so throw an error
 }
-module.exports = getCardValue;
\ No newline at end of file
+
+      
+module.exports = getCardValue;
+
diff --git a/Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js b/Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js
index 03a8e2f34..b81192c09 100644
--- a/Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js
+++ b/Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js
@@ -1,11 +1,34 @@
 const getCardValue = require("./3-get-card-value");
 
-test("should return 11 for Ace of Spades", () => {
+test("should return 11 for  Ace of Spades", () => {
     const aceofSpades = getCardValue("A♠");
     expect(aceofSpades).toEqual(11);
     });
 
+
+
+test("should return rank for  Number Cards", () => {
+    const fiveofHearts = getCardValue("5♥");
+    expect(fiveofHearts).toEqual(5);
+    });
+
+test("should return 10 for  Face Cards", () => {
+    const facecards = getCardValue("Q♥");
+    expect(facecards).toEqual(10);
+    });
+
+test("should return 11 for  AceCard", () => {
+    const AceCard = getCardValue("A♥");
+    expect(AceCard).toEqual(11);
+    });
+
+test('throws error for invalid card', () => {
+  expect(() => getCardValue("ST")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("0x02♠")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("5.1♠")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("   5   ♠")).toThrow("Invalid card rank.");
+});
 // Case 2: Handle Number Cards (2-10):
 // Case 3: Handle Face Cards (J, Q, K):
 // Case 4: Handle Ace (A):
-// Case 5: Handle Invalid Cards:
+// Case 5: Handle Invalid Cards:
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/count.js b/Sprint-3/3-mandatory-practice/implement/count.js
index fce249650..4e2ee5d17 100644
--- a/Sprint-3/3-mandatory-practice/implement/count.js
+++ b/Sprint-3/3-mandatory-practice/implement/count.js
@@ -1,5 +1,15 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+  if (!stringOfCharacters.includes(findCharacter))
+    return 0;
+  else {
+    let count = 0;
+    for (let char of stringOfCharacters) {
+      if (char === findCharacter) {
+        count++;
+      }
+    }
+    return count;
+  }
 }
 
 module.exports = countChar;
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/count.test.js b/Sprint-3/3-mandatory-practice/implement/count.test.js
index 42baf4b4b..ef3b3a598 100644
--- a/Sprint-3/3-mandatory-practice/implement/count.test.js
+++ b/Sprint-3/3-mandatory-practice/implement/count.test.js
@@ -10,15 +10,31 @@ const countChar = require("./count");
 // When the function is called with these inputs,
 // Then it should correctly count overlapping occurrences of char (e.g., 'a' appears five times in 'aaaaa').
 
-test("should count multiple occurrences of a character", () => {
-  const str = "aaaaa";
+/*test("should count multiple occurrences of a character", () => {
+  const str = "aaaaaa";
   const char = "a";
   const count = countChar(str, char);
-  expect(count).toEqual(5);
+  expect(count).toEqual(6);
+});
+test("should count multiple occurrences of a character", () => {
+  const str = "sftyeh";
+  const char = "s";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});*/
+test("should count occurrences of a character", () => {
+  expect(countChar("aaaaaa", "a")).toEqual(6);
+  expect(countChar("sftyeh", "s")).toEqual(1);
 });
-
 // Scenario: No Occurrences
 // Given the input string str,
 // And a character char that does not exist within the case-sensitive str,
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of the char were found in the case-sensitive str.
+test("should return zero for no occurrences of a character", () =>{
+  const str1= "aaaaa";
+  const char1 = "s";
+  const count1 = countChar(str1, char1);
+  expect(count1).toEqual(0);
+
+});
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js b/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js
index 24f528b0d..9377a58fe 100644
--- a/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js
+++ b/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js
@@ -1,5 +1,16 @@
 function getOrdinalNumber(num) {
- return "1st";
+  const remainder10 = num % 10;
+  const remainder100 = num % 100;
+
+  if (remainder100 >= 11 && remainder100 <= 13) { //deals with numbers 11,12,13
+    return `${num}th`;               //using template literal to combine num with a string th.
+  }
+
+  if (remainder10 === 1) return `${num}st`; 
+  if (remainder10 === 2) return `${num}nd`;
+  if (remainder10 === 3) return `${num}rd`;
+
+  return `${num}th`;
 }
 
 module.exports = getOrdinalNumber;
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.test.js b/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.test.js
index 6d55dfbb4..60df9a17a 100644
--- a/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.test.js
+++ b/Sprint-3/3-mandatory-practice/implement/get-ordinal-number.test.js
@@ -8,6 +8,30 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
-    expect(getOrdinalNumber(1)).toEqual("1st");
-    });
+test("append 'st' to numbers ending in 1, except those ending in 11", () => {
+  expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(11)).toEqual("11th"); // exception case
+});
+
+test("append 'nd' to numbers ending in 2, except those ending in 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(12)).toEqual("12th"); // exception case
+});
+
+test("append 'rd' to numbers ending in 3, except those ending in 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(203)).toEqual("203rd");
+  expect(getOrdinalNumber(13)).toEqual("13th"); // exception case
+});
+
+test("append 'th' to numbers ending in 0, 4–9, or 11–13", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(28)).toEqual("28th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+});
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/repeat.js b/Sprint-3/3-mandatory-practice/implement/repeat.js
index 621f9bd35..e4db1121d 100644
--- a/Sprint-3/3-mandatory-practice/implement/repeat.js
+++ b/Sprint-3/3-mandatory-practice/implement/repeat.js
@@ -1,5 +1,9 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Invalid input: count must be non-negative");
+  }
+  return String(str).repeat(count);
 }
 
+
 module.exports = repeat;
\ No newline at end of file
diff --git a/Sprint-3/3-mandatory-practice/implement/repeat.test.js b/Sprint-3/3-mandatory-practice/implement/repeat.test.js
index 8a4ab42ef..4da93305c 100644
--- a/Sprint-3/3-mandatory-practice/implement/repeat.test.js
+++ b/Sprint-3/3-mandatory-practice/implement/repeat.test.js
@@ -20,13 +20,26 @@ test("should repeat the string count times", () => {
 // Given a target string str and a count equal to 1,
 // When the repeat function is called with these inputs,
 // Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
-
+test("should repeat the string count times", () => {
+    const str = "hello";
+    const count = 1;
+    const repeatedStr = repeat(str, count);
+    expect(repeatedStr).toEqual("hello");
+    });
 // case: Handle Count of 0:
 // Given a target string str and a count equal to 0,
 // When the repeat function is called with these inputs,
 // Then it should return an empty string, ensuring that a count of 0 results in an empty output.
-
+test("should return an empty string", () => {
+    const str = "hello";
+    const count = 0;
+    const repeatedStr = repeat(str, count);
+    expect(repeatedStr).toEqual("");
+    });
 // case: Negative Count:
 // Given a target string str and a negative integer count,
 // When the repeat function is called with these inputs,
 // Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+test("should throw an error for negative count", () => {
+  expect(() => repeat("hello", -2)).toThrow("Invalid input: count must be non-negative");
+});
\ No newline at end of file