diff --git a/Week03/pyramid_arda_omer.py b/Week03/pyramid_arda_omer.py
new file mode 100644
index 00000000..919d4f1a
--- /dev/null
+++ b/Week03/pyramid_arda_omer.py
@@ -0,0 +1,14 @@
+def calculate_pyramid_height(number_of_blocks):
+    current_height = 0
+    blocks_needed_for_next_level = 1
+    remaining_blocks = number_of_blocks
+
+    while True:
+        if remaining_blocks < blocks_needed_for_next_level:
+            break
+
+        remaining_blocks = remaining_blocks - blocks_needed_for_next_level
+        current_height = current_height + 1
+        blocks_needed_for_next_level = blocks_needed_for_next_level + 1
+
+    return current_height
\ No newline at end of file
diff --git a/Week03/sequences_arda_omer.py b/Week03/sequences_arda_omer.py
new file mode 100644
index 00000000..91e359a0
--- /dev/null
+++ b/Week03/sequences_arda_omer.py
@@ -0,0 +1,26 @@
+def remove_duplicates(seq: list) -> list:
+    unique_items = []
+
+    for item in seq:
+        if item not in unique_items:
+            unique_items.append(item)
+
+    return unique_items
+
+
+def list_counts(seq: list) -> dict:
+    counts = {}
+
+    for item in seq:
+        counts[item] = counts.get(item, 0) + 1
+
+    return counts
+
+
+def reverse_dict(d: dict) -> dict:
+    reversed_dictionary = {}
+
+    for key, value in d.items():
+        reversed_dictionary[value] = key
+
+    return reversed_dictionary
\ No newline at end of file