diff --git a/Sprint-3/2-practice-tdd/count.test.js b/Sprint-3/2-practice-tdd/count.test.js
index 179ea0ddf..1a5c29421 100644
--- a/Sprint-3/2-practice-tdd/count.test.js
+++ b/Sprint-3/2-practice-tdd/count.test.js
@@ -18,6 +18,25 @@ test("should count multiple occurrences of a character", () => {
 });
 
 // Scenario: No Occurrences
+test(`should return zero the character doesn't exist in the string`, () => {
+  const str = "bravo";
+  const char = "u";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Empty String
+test(`should return zero when the string is empty`, () => {
+  expect(countChar("", "a")).toEqual(0);
+});
+
+// Scenario: Multiple Occurrences
+test("should count multiple occurrences of characters (including mixed and case-sensitive)", () => {
+  expect(countChar("aaaaa", "a")).toEqual(5); // simple multiple
+  expect(countChar("1-2-3-4-5-", "-")).toEqual(5); // mixed characters
+  expect(countChar("AaAa", "A")).toEqual(2); // case sensitivity
+});
+
 // Given the input string `str`,
 // And a character `char` that does not exist within `str`.
 // When the function is called with these inputs,
diff --git a/Sprint-3/2-practice-tdd/get-ordinal-number.test.js b/Sprint-3/2-practice-tdd/get-ordinal-number.test.js
index adfa58560..17b39984b 100644
--- a/Sprint-3/2-practice-tdd/get-ordinal-number.test.js
+++ b/Sprint-3/2-practice-tdd/get-ordinal-number.test.js
@@ -13,8 +13,37 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Case 1: Numbers ending with 1 (but not 11)
 // When the number ends with 1, except those ending with 11,
 // Then the function should return a string by appending "st" to the number.
+
 test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 2 (but NOT 12)
+test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(102)).toEqual("102");
+});
+
+// Case 3: Numbers ending with 3 (but NOT 13)
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+});
+
+// Case 4: Numbers ending with 11, 12, or 13 --- 11,12,13,111,121,131,
+test("should append 'th' for numbers ending with 11, 12, 13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+
+// Case 5: Numbers ending with larger numbers of 111, 121, 131
+test("should append 'th' for numbers ending with 111, 121, 131", () => {
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(121)).toEqual("121th");
+  expect(getOrdinalNumber(131)).toEqual("131th");
+});
diff --git a/Sprint-3/2-practice-tdd/repeat-str.js b/Sprint-3/2-practice-tdd/repeat-str.js
index 2af0a2cea..923599a0c 100644
--- a/Sprint-3/2-practice-tdd/repeat-str.js
+++ b/Sprint-3/2-practice-tdd/repeat-str.js
@@ -1,7 +1,7 @@
 function repeatStr() {
   // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat).
   // The goal is to re-implement that function, not to use it.
-  return "hellohellohello";
+  return String.repeat(count);
 }
 
 module.exports = repeatStr;
diff --git a/Sprint-3/2-practice-tdd/repeat-str.test.js b/Sprint-3/2-practice-tdd/repeat-str.test.js
index a3fc1196c..e6e5058df 100644
--- a/Sprint-3/2-practice-tdd/repeat-str.test.js
+++ b/Sprint-3/2-practice-tdd/repeat-str.test.js
@@ -11,22 +11,39 @@ const repeatStr = require("./repeat-str");
 
 test("should repeat the string count times", () => {
   const str = "hello";
-  const count = 3;
+  const count = -5;
   const repeatedStr = repeatStr(str, count);
   expect(repeatedStr).toEqual("hellohellohello");
 });
 
 // Case: handle count of 1:
+test("should repeat the string count of 1", () => {
+  const str = "fella";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("fella");
+});
+
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
 
 // Case: Handle count of 0:
+test("should repeat the string count of 0", () => {
+  const str = "fella";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
+
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
 // Then it should return an empty string.
 
 // Case: Handle negative count:
+test(`should throw an error for negative count`, () => {
+  expect(() => repeatedStr("fella", -2)).toThrowError();
+});
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,
 // Then it should throw an error, as negative counts are not valid.