diff --git a/Questions.md b/Questions.md
index acd58b6..d4c3b14 100644
--- a/Questions.md
+++ b/Questions.md
@@ -15,4 +15,6 @@
 11. [Set Matrix Zeroes](https://leetcode.com/problems/set-matrix-zeroes/description/) `Leetcode 150` `Striver`
 12. [Maximum Subarray](https://leetcode.com/problems/maximum-subarray/description/) `Leetcode 150` `Striver`
 13. [Rotate Image](https://leetcode.com/problems/rotate-image/description/) `Leetcode 150` `Striver`
-14. [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/description/) `Leetcode 150` `Striver`
\ No newline at end of file
+14. [Merge Sorted Array](https://leetcode.com/problems/merge-sorted-array/description/) `Leetcode 150` `Striver`
+15. [Find the Duplicate Number](https://leetcode.com/problems/find-the-duplicate-number/description/) `Striver`
+16. [Search a 2D Matrix](https://leetcode.com/problems/search-a-2d-matrix/description/) `Leetcode 150` `Striver`