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..6d8d2a215 100644
--- a/Sprint-3/1-key-implement/1-get-angle-type.js
+++ b/Sprint-3/1-key-implement/1-get-angle-type.js
@@ -8,8 +8,15 @@
 // 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 (typeof angle === "number" && isFinite(angle)) {
+    if (angle <= 0 || angle >= 360) return "Invalid angle";
+    if (angle < 90) return "Acute angle";
+    if (angle === 90) return "Right angle";
+    if (angle < 180) return "Obtuse angle";
+    if (angle === 180) return "Straight angle";
+    if (angle < 360) return "Reflex angle";
+  } else return "Invalid Input";
+  // read to the end, complete line 36, then pass your test here
 }
 
 // we're going to use this helper function to make our assertions easier to read
@@ -43,14 +50,27 @@ assertEquals(acute, "Acute angle");
 // 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 strDegree = getAngleType(180);
+assertEquals(strDegree, "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
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+
+// When the angle is less than or equal to 0 or greater than or equal to 360,
+// Then the function should return "Invalid angle
+const invalidAngle = getAngleType(-20);
+assertEquals(invalidAngle, "Invalid angle");
+
+// When the input is invalid,
+// Then the function should return "invalid Input"
+const invalidInput = getAngleType("Aida");
+assertEquals(invalidInput, "Invalid Input");
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..b5f39a8e9 100644
--- a/Sprint-3/1-key-implement/2-is-proper-fraction.js
+++ b/Sprint-3/1-key-implement/2-is-proper-fraction.js
@@ -8,7 +8,7 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+  return Math.abs(numerator) < Math.abs(denominator); // false or true
 }
 
 // here's our helper again
@@ -40,14 +40,20 @@ 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);
-// ====> complete with your assertion
+assertEquals(negativeFraction, true);
 
 // Equal Numerator and Denominator check:
 // Input: numerator = 3, denominator = 3
 // 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);
-// ====> complete with your assertion
+assertEquals(equalFraction, false);
 
 // Stretch:
 // What other scenarios could you test for?
+
+const zeroNumerator = isProperFraction(0, 3);
+assertEquals(zeroNumerator, false);
+
+const negativeDenominator = isProperFraction(3, -3);
+assertEquals(negativeDenominator, false);
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..89edbe6cc 100644
--- a/Sprint-3/1-key-implement/3-get-card-value.js
+++ b/Sprint-3/1-key-implement/3-get-card-value.js
@@ -8,9 +8,15 @@
 // 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;
-}
+  const rank = card.slice(0, -1); // Get everything before the suit emoji
+
+  if (rank === "A") return 11;
+  if (["K", "Q", "J", "10"].includes(rank)) return 10;
+  const number = parseInt(rank);
+  if (number >= 2 && number <= 9) return number;
 
+  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
@@ -22,7 +28,8 @@ function assertEquals(actualOutput, targetOutput) {
 }
 // Acceptance criteria:
 
-// Given a card string in the format "A♠" (representing a card in blackjack - the last character will always be an emoji for a suit, and all characters before will be a number 2-10, or one letter of J, Q, K, A),
+// Given a card string in the format "A♠" (representing a card in blackjack -
+// the last character will always be an emoji for a suit, and all characters before will be a number 2-10, or one letter of J, Q, K, A),
 // When the function getCardValue is called with this card string as input,
 // Then it should return the numerical card value
 const aceofSpades = getCardValue("A♠");
@@ -33,19 +40,28 @@ assertEquals(aceofSpades, 11);
 // 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♥");
-// ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(fiveofHearts, 5);
 
 // 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 FaceCard = getCardValue("J♥");
+assertEquals(FaceCard, 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 HandleAce = getCardValue("A♥");
+assertEquals(HandleAce, 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."
+
+const InvalidCard = getCardValue("B♣");
+assertEquals(InvalidCard, 32);
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..740ecee2b 100644
--- a/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js
+++ b/Sprint-3/2-mandatory-rewrite/1-get-angle-type.js
@@ -1,18 +1,16 @@
 function getAngleType(angle) {
-  if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  if (typeof angle === "number" && isFinite(angle)) {
+    if (angle <= 0 || angle >= 360) return "Invalid angle";
+    if (angle < 90) return "Acute angle";
+    if (angle === 90) return "Right angle";
+    if (angle < 180) return "Obtuse angle";
+    if (angle === 180) return "Straight angle";
+    if (angle < 360) return "Reflex angle";
+  } else return "Invalid input";
 }
 
-
-
-
-
-
-
-
 // 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 
+// We will upgrade our approach to ES6 modules in the next course module, so for now
 // we have just written the CommonJS module.exports syntax for you
-module.exports = getAngleType;
\ No newline at end of file
+module.exports = getAngleType;
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..f5f96facd 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
@@ -10,15 +10,60 @@ test("should identify right angle (90°)", () => {
 // Case 2: Identify Acute Angles:
 // When the angle is less than 90 degrees,
 // Then the function should return "Acute angle"
+test("should identify acute angle (< 90°)", () => {
+  expect(getAngleType(45)).toEqual("Acute angle");
+  expect(getAngleType(10)).toEqual("Acute angle");
+  expect(getAngleType(1.23)).toEqual("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"
+test("should identify obtuse angle (90° < angle < 180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(170)).toEqual("Obtuse angle");
+  expect(getAngleType(145.87)).toEqual("Obtuse angle");
+});
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+test("should identify straight angle (180°)", () => {
+  expect(getAngleType(180)).toEqual("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"
+test("should identify reflex angle (180° < angle < 360°)", () => {
+  expect(getAngleType(300)).toEqual("Reflex angle");
+  expect(getAngleType(359.999)).toEqual("Reflex angle");
+  expect(getAngleType(180.001)).toEqual("Reflex angle");
+});
+
+// When the angle is less than or equal to 0 or greater than or equal to 360,
+// Then the function should return "Invalid angle
+
+test("should return 'Invalid angle' for angles ≤ 0 or ≥ 360", () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-12)).toEqual("Invalid angle");
+  expect(getAngleType(450)).toEqual("Invalid angle");
+});
+
+// Case: Angles near important limits
+// These tests make sure the function works correctly
+// for values very close to 90° and 360°
+test("should return 'Acute angle' for angle just below 90°", () => {
+  expect(getAngleType(89.999)).toEqual("Acute angle");
+});
+test("should return 'Reflex angle' for angle just below 360°", () => {
+  expect(getAngleType(359.999999)).toEqual("Reflex angle");
+});
+
+// Case: For invalid input
+// Should return "Invalid input" for non-numeric or missing values
+test("should return 'Invalid input' for invalid", () => {
+  expect(getAngleType("Aida")).toEqual("Invalid input");
+  expect(getAngleType("")).toEqual("Invalid input");
+  expect(getAngleType()).toEqual("Invalid input");
+});
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..a96c4f8d9 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 +1,5 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+  return Math.abs(numerator) < Math.abs(denominator); // false or true
 }
 
-module.exports = isProperFraction;
\ No newline at end of file
+module.exports = isProperFraction;
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..b2ae47e9b 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
@@ -5,7 +5,16 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for a Improper fraction", () => {
+  expect(isProperFraction(4, 3)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a Negative fraction", () => {
+  expect(isProperFraction(-3, 6)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for Equal Numerator and Denominator", () => {
+  expect(isProperFraction(6, 6)).toEqual(false);
+});
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..540ed0243 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 +1,17 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+  const rank = card.slice(0, -1); // Get everything before the suit emoji
+
+  if (rank === "A") return 11;
+  if (["K", "Q", "J", "10"].includes(rank)) return 10;
+  const number = parseInt(rank);
+  if (number >= 2 && number <= 9) return number;
+
+  throw new Error("Invalid card rank");
 }
-module.exports = getCardValue;
\ No newline at end of file
+module.exports = getCardValue;
+
+console.log(getCardValue("2XYZ♠")); // ==> 2
+console.log(getCardValue("0x02♠")); // ==> 2
+console.log(getCardValue("2.1♠")); // ==> 2
+// console.log(getCardValue("00_02♠")); //==> Invalid card rank
+console.log(getCardValue("2.5♥"));
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..989179664 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 +1,46 @@
 const getCardValue = require("./3-get-card-value");
+let cardList = ["♥", "♣", "♠", "♦"];
+let faceCardList = ["J", "Q", "K"];
+let invalidCards = ["B♣", "11♠", "0♣", "5", "♠", "_", ""];
 
 test("should return 11 for Ace of Spades", () => {
-    const aceofSpades = getCardValue("A♠");
-    expect(aceofSpades).toEqual(11);
-    });
+  const aceofSpades = getCardValue("A♠");
+  expect(aceofSpades).toEqual(11);
+});
 
 // Case 2: Handle Number Cards (2-10):
+
+for (let item of cardList) {
+  for (let i = 2; i <= 10; i++) {
+    test(`should return ${i} for ${i}${item}`, () => {
+      const fiveofHearts = getCardValue(`${i}${item}`);
+      expect(fiveofHearts).toEqual(i);
+    });
+  }
+}
+
 // Case 3: Handle Face Cards (J, Q, K):
+for (let face of faceCardList) {
+  for (let item of cardList) {
+    test(`should return 10 for ${face}${item}`, () => {
+      const FaceCard = getCardValue(`${face}${item}`);
+      expect(FaceCard).toEqual(10);
+    });
+  }
+}
+
 // Case 4: Handle Ace (A):
+for (let item of cardList) {
+  test(`should return 11 for Ace of ${item}`, () => {
+    const HandleAce = getCardValue(`A${item}`);
+    expect(HandleAce).toEqual(11);
+  });
+}
+
 // Case 5: Handle Invalid Cards:
+
+for (let invCard of invalidCards) {
+  test(`should throw error for invalid card ${invCard}`, () => {
+    expect(() => getCardValue(invCard)).toThrow("Invalid card rank");
+  });
+}
diff --git a/Sprint-3/3-mandatory-practice/implement/count.js b/Sprint-3/3-mandatory-practice/implement/count.js
index fce249650..d59e425d6 100644
--- a/Sprint-3/3-mandatory-practice/implement/count.js
+++ b/Sprint-3/3-mandatory-practice/implement/count.js
@@ -1,5 +1,11 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+  let count = 0;
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      count++;
+    }
+  }
+  return count;
 }
 
-module.exports = countChar;
\ No newline at end of file
+module.exports = countChar;
diff --git a/Sprint-3/3-mandatory-practice/implement/count.test.js b/Sprint-3/3-mandatory-practice/implement/count.test.js
index 42baf4b4b..4f2175c3d 100644
--- a/Sprint-3/3-mandatory-practice/implement/count.test.js
+++ b/Sprint-3/3-mandatory-practice/implement/count.test.js
@@ -22,3 +22,10 @@ test("should count multiple occurrences of a character", () => {
 // 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 0 when character does not exist", () => {
+  const str = "Hello";
+  const char = "E";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
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..e9c9e190d 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 +1,22 @@
 function getOrdinalNumber(num) {
- return "1st";
+  const lastTwo = num % 100;
+  const lastDigit = num % 10;
+  if (lastTwo >= 11 && lastTwo <= 13) {
+    // for 11 , 12, 13
+    return num + "th";
+  }
+
+  switch (lastDigit) {
+    case 1:
+      return num + "st";
+    case 2:
+      return num + "nd";
+    case 3:
+      return num + "rd";
+    default:
+      return num + "th";
+  }
 }
 
-module.exports = getOrdinalNumber;
\ No newline at end of file
+module.exports = getOrdinalNumber;
+console.log(getOrdinalNumber(2));
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..5c200214b 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 +8,32 @@ 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("adds 'st' to numbers like 1, 21, 101 (except 11)", () => {
+  expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(101)).toEqual("101st");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+
+test("adds 'nd' to numbers like 2, 22, 102 (except 12)", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(102)).toEqual("102nd");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+});
+
+test("adds 'rd' to numbers like 3, 23, 103 (except 13)", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+
+test("adds 'th' to other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+});
diff --git a/Sprint-3/3-mandatory-practice/implement/repeat.js b/Sprint-3/3-mandatory-practice/implement/repeat.js
index 621f9bd35..4b58e4ac4 100644
--- a/Sprint-3/3-mandatory-practice/implement/repeat.js
+++ b/Sprint-3/3-mandatory-practice/implement/repeat.js
@@ -1,5 +1,13 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Count cannot be negative");
+  } else {
+    let result = "";
+    for (let i = 0; i < count; i++) {
+      result += str;
+    }
+    return result;
+  }
 }
-
-module.exports = repeat;
\ No newline at end of file
+// console.log(repeat("Aida", -5));
+module.exports = repeat;
diff --git a/Sprint-3/3-mandatory-practice/implement/repeat.test.js b/Sprint-3/3-mandatory-practice/implement/repeat.test.js
index 8a4ab42ef..2a1b2a9ae 100644
--- a/Sprint-3/3-mandatory-practice/implement/repeat.test.js
+++ b/Sprint-3/3-mandatory-practice/implement/repeat.test.js
@@ -10,23 +10,40 @@ const repeat = require("./repeat");
 // Then it should repeat the str count times and return a new string containing the repeated str values.
 
 test("should repeat the string count times", () => {
-    const str = "hello";
-    const count = 3;
-    const repeatedStr = repeat(str, count);
-    expect(repeatedStr).toEqual("hellohellohello");
-    });
+  const str = "hello";
+  const count = 3;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("hellohellohello");
+});
 
 // case: handle Count of 1:
 // 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 return the original string when count is 1", () => {
+  const str = "Aida";
+  const count = 1;
+  expect(repeat(str, count)).toEqual("Aida");
+});
+
 // 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 when count is 0", () => {
+  const str = "Aida";
+  const count = 0;
+  expect(repeat(str, count)).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 when count is negative", () => {
+  const str = "Aida";
+  const count = -3;
+
+  expect(() => repeat(str, count)).toThrow("Count cannot be negative");
+});