diff --git a/src/my_project/interviews/top_150_questions_round_11/sqrtx.py b/src/my_project/interviews/top_150_questions_round_11/sqrtx.py
new file mode 100644
index 00000000..1e295da6
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_11/sqrtx.py
@@ -0,0 +1,20 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def mySqrt(self, x: int) -> int:
+
+        left, right = 0, x 
+
+        while left <= right:
+
+            mid = (left + right)//2
+
+            if mid ** 2 < x:
+                left = mid + 1 
+            elif mid ** 2 > x:
+                right = mid - 1
+            else:
+                return mid 
+            
+        return min(left, right)
\ No newline at end of file
diff --git a/tests/test_150_questions_round_11/test_sqrtx_round_11.py b/tests/test_150_questions_round_11/test_sqrtx_round_11.py
new file mode 100644
index 00000000..b2843cf9
--- /dev/null
+++ b/tests/test_150_questions_round_11/test_sqrtx_round_11.py
@@ -0,0 +1,17 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_11\
+.sqrtx import Solution
+
+class SqrtxTestCase(unittest.TestCase):
+
+    def test_even_sqrtx(self):
+        solution = Solution()
+        output = solution.mySqrt(x=4)
+        target = 2 
+        self.assertEqual(output, target)
+
+    def test_odd_sqrtx(self):
+        solution = Solution()
+        output = solution.mySqrt(x=8)
+        target = 2 
+        self.assertEqual(output, target)
\ No newline at end of file