diff --git a/implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js b/implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js
index cf50f6cad..01d4e48d0 100644
--- a/implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js
+++ b/implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js
@@ -6,7 +6,27 @@ import { getAngleType } from "../implement/1-get-angle-type.js";
 // TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
 
-test("Classifies right angles", () => {
-  const right = getAngleType(90);
-  assert.equal(right, "Right angle");
+test("returns Acute angle for angles between 0 and 90", () => {
+  assert.strictEqual(getAngleType(45), "Acute angle");
+});
+
+test("returns Right angle for 90", () => {
+  assert.strictEqual(getAngleType(90), "Right angle");
+});
+
+test("returns Obtuse angle for angles between 90 and 180", () => {
+  assert.strictEqual(getAngleType(120), "Obtuse angle");
+});
+
+test("returns Straight angle for 180", () => {
+  assert.strictEqual(getAngleType(180), "Straight angle");
+});
+
+test("returns Reflex angle for angles between 180 and 360", () => {
+  assert.strictEqual(getAngleType(270), "Reflex angle");
+});
+
+test("returns Invalid angle for angles outside the valid range", () => {
+  assert.strictEqual(getAngleType(0), "Invalid angle");
+  assert.strictEqual(getAngleType(360), "Invalid angle");
 });
diff --git a/implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js b/implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js
index a29084605..3775368e1 100644
--- a/implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js
+++ b/implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js
@@ -6,7 +6,48 @@ import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 // TODO: Write tests to cover all cases.
 // What combinations of numerators and denominators should you test?
 
-test("Basic proper fraction", () => {
-  // Example: 1/2 is a proper fraction
+// Case 1: Proper fraction
+test("should return true when numerator is smaller than denominator", () => {
   assert.equal(isProperFraction(1, 2), true);
+  assert.equal(isProperFraction(3, 5), true);
+});
+
+// Case 2: Numerator equals denominator
+test("should return false when numerator equals denominator", () => {
+  assert.equal(isProperFraction(2, 2), false);
+});
+
+// Case 3: Numerator is greater than denominator
+test("should return false when numerator is greater than denominator", () => {
+  assert.equal(isProperFraction(3, 2), false);
+});
+
+// Case 4: Zero numerator
+test("should return false when numerator is zero", () => {
+  assert.equal(isProperFraction(0, 2), false);
+});
+
+// Case 5: Negative numerator
+test("should return false when numerator is negative and denominator is positive", () => {
+  assert.equal(isProperFraction(-1, 2), false);
+});
+
+// Case 6: Negative denominator
+test("should return false when denominator is negative and numerator is positive", () => {
+  assert.equal(isProperFraction(1, -2), false);
+});
+
+// Case 7: Zero denominator
+test("should return false when denominator is zero", () => {
+  assert.equal(isProperFraction(1, 0), false);
+});
+
+// Case 8: Both numerator and denominator are negative
+test("should return false when both are negative and numerator has a smaller magnitude", () => {
+  assert.equal(isProperFraction(-1, -2), false);
+});
+
+// Case 9: Both negative but numerator has a larger magnitude
+test("should return false when both are negative and numerator has a larger magnitude", () => {
+  assert.equal(isProperFraction(-2, -1), false);
 });
diff --git a/implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js b/implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js
index f5092d9b1..1412657c8 100644
--- a/implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js
+++ b/implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js
@@ -10,7 +10,36 @@ test("Valid single-digit card", () => {
 });
 
 test("Arbitrary non-card string", () => {
-  assert.throws(() => getCardValue("invalid"), /Expected a number followed by a suit, but got "invalid"/, "Expected clear error");
+  assert.throws(
+    () => getCardValue("invalid"),
+    /Expected a number followed by a suit, but got "invalid"/,
+    "Expected clear error"
+  );
 });
 
-// TODO: What other invalid card cases can you think of?
+test("Ace should return 11", () => {
+  assert.equal(getCardValue("A♠"), 11);
+});
+
+test("Face cards should return 10", () => {
+  assert.equal(getCardValue("J♠"), 10);
+  assert.equal(getCardValue("Q♠"), 10);
+  assert.equal(getCardValue("K♠"), 10);
+});
+
+test("Number cards should return their numeric value", () => {
+  assert.equal(getCardValue("2♠"), 2);
+  assert.equal(getCardValue("10♠"), 10);
+});
+
+test("Should throw an error for a missing suit", () => {
+  assert.throws(() => getCardValue("A"), Error);
+});
+
+test("Should throw an error for an invalid rank", () => {
+  assert.throws(() => getCardValue("X♠"), Error);
+});
+
+test("Should throw an error for an empty string", () => {
+  assert.throws(() => getCardValue(""), Error);
+});
diff --git a/implement-and-rewrite-tests/implement/1-get-angle-type.js b/implement-and-rewrite-tests/implement/1-get-angle-type.js
index 8a6fba050..21898423d 100644
--- a/implement-and-rewrite-tests/implement/1-get-angle-type.js
+++ b/implement-and-rewrite-tests/implement/1-get-angle-type.js
@@ -17,5 +17,17 @@
 // execute the code to ensure all tests pass.
 
 export function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle > 0 && angle < 90) {
+    return "Acute angle";
+  } else if (angle === 90) {
+    return "Right angle";
+  } else if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  } else if (angle === 180) {
+    return "Straight angle";
+  } else if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  } else {
+    return "Invalid angle";
+  }
 }
diff --git a/implement-and-rewrite-tests/implement/2-is-proper-fraction.js b/implement-and-rewrite-tests/implement/2-is-proper-fraction.js
index f983800f0..ec8d57651 100644
--- a/implement-and-rewrite-tests/implement/2-is-proper-fraction.js
+++ b/implement-and-rewrite-tests/implement/2-is-proper-fraction.js
@@ -14,5 +14,9 @@
 // execute the code to ensure all tests pass.
 
 export function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (numerator > 0 && denominator > 0 && numerator < denominator) {
+    return true;
+  } else {
+    return false;
+  }
 }
diff --git a/implement-and-rewrite-tests/implement/3-get-card-value.js b/implement-and-rewrite-tests/implement/3-get-card-value.js
index 9614ab1ee..afddaf8ff 100644
--- a/implement-and-rewrite-tests/implement/3-get-card-value.js
+++ b/implement-and-rewrite-tests/implement/3-get-card-value.js
@@ -24,5 +24,19 @@
 // execute the code to ensure all tests pass.
 
 export function getCardValue(card) {
-  // TODO: Implement this function
+  if (typeof card !== "string" || !/^(A|[2-9]|10|J|Q|K)[♠♥♦♣]$/.test(card)) {
+    throw new Error(`Expected a number followed by a suit, but got "${card}"`);
+  }
+
+  if (card.startsWith("A")) {
+    return 11;
+  }
+  if (card.startsWith("J") || card.startsWith("Q") || card.startsWith("K")) {
+    return 10;
+  }
+
+  const value = parseInt(card);
+  if (!isNaN(value)) {
+    return value;
+  }
 }
diff --git a/implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js b/implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js
index e0ba786ab..7ff860a62 100644
--- a/implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js
+++ b/implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js
@@ -5,14 +5,38 @@ import { getAngleType } from "../implement/1-get-angle-type.js";
 
 // Case 1: Acute angles
 test(`should return "Acute angle" when (0 < angle < 90)`, () => {
-  // Test various acute angles, including boundary cases
   expect(getAngleType(1)).toEqual("Acute angle");
   expect(getAngleType(45)).toEqual("Acute angle");
   expect(getAngleType(89)).toEqual("Acute angle");
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" for 90 degrees`, () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
 // Case 3: Obtuse angles
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test(`should return "Straight angle" for 180 degrees`, () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
 // Case 6: Invalid angles
+test(`should return "Invalid angle" when ( angle <= 0 or angle >= 360)`, () => {
+  expect(getAngleType(-1)).toEqual("Invalid angle");
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(361)).toEqual("Invalid angle");
+});
diff --git a/implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js b/implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js
index 5d49e2d8b..7e6f6b1ea 100644
--- a/implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js
+++ b/implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js
@@ -2,7 +2,23 @@ import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 
 // TODO: Write tests in Jest syntax to cover all combinations of positives, negatives, zeros, and other categories.
 
-// Special case: numerator is zero
-test(`should return false when denominator is zero`, () => {
-  expect(isProperFraction(1, 0)).toEqual(false);
+test("should return true for a proper fraction", () => {
+  expect(isProperFraction(1, 2)).toBe(true);
+  expect(isProperFraction(3, 5)).toBe(true);
+});
+
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(2, 2)).toBe(false);
+});
+
+test("should return false when numerator is greater than denominator", () => {
+  expect(isProperFraction(3, 2)).toBe(false);
+});
+
+test("should return true when numerator is zero", () => {
+  expect(isProperFraction(0, 2)).toBe(true);
+});
+
+test("should return false when denominator is zero", () => {
+  expect(isProperFraction(1, 0)).toBe(false);
 });
diff --git a/implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js b/implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js
index a6de5a82a..7eebd3704 100644
--- a/implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js
+++ b/implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js
@@ -3,8 +3,45 @@ import { getCardValue } from "../implement/3-get-card-value.js";
 // TODO: Write tests in Jest syntax to cover all possible outcomes.
 
 // Case 1: Ace (A)
-test(`Should return 11 when given an ace card`, () => {
-  expect(getCardValue("A♠")).toEqual(11);
+
+describe("Ace cards", () => {
+  test("Should return 11 when given and ace card", () => {
+    expect(getCardValue("A♠")).toEqual(11);
+  });
+});
+
+describe("Number cards (2-10)", () => {
+  test("Should return the number for a number card", () => {
+    expect(getCardValue("2♠")).toEqual(2);
+    expect(getCardValue("5♠")).toEqual(5);
+    expect(getCardValue("10♠")).toEqual(10);
+  });
+});
+
+describe("Face cards (J, Q, K)", () => {
+  test("Should return 10 for face cards", () => {
+    expect(getCardValue("J♠")).toEqual(10);
+    expect(getCardValue("Q♠")).toEqual(10);
+    expect(getCardValue("K♠")).toEqual(10);
+  });
+});
+
+describe("Invalid cards", () => {
+  test("Should throw an error for an invalid card", () => {
+    expect(() => getCardValue("invalid")).toThrow();
+  });
+
+  test("Should throw an error when the suit is missing", () => {
+    expect(() => getCardValue("A")).toThrow();
+  });
+
+  test("Should throw an error for an invalid rank", () => {
+    expect(() => getCardValue("X♠")).toThrow();
+  });
+
+  test("Should throw an error for an empty string", () => {
+    expect(() => getCardValue("")).toThrow();
+  });
 });
 
 // Suggestion: Group the remaining test data into these categories:
@@ -15,4 +52,3 @@ test(`Should return 11 when given an ace card`, () => {
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:
 // https://jestjs.io/docs/expect#tothrowerror
-