diff --git a/Week02/types_berkay_altunbag.py b/Week02/types_berkay_altunbag.py
new file mode 100644
index 00000000..47bcb099
--- /dev/null
+++ b/Week02/types_berkay_altunbag.py
@@ -0,0 +1,4 @@
+my_int = 8
+my_float = 7.77
+my_bool = True
+my_complex = 7 + 2j
\ No newline at end of file
diff --git a/Week03/pyramid_berkay_altunbag.py b/Week03/pyramid_berkay_altunbag.py
new file mode 100644
index 00000000..b3f3d738
--- /dev/null
+++ b/Week03/pyramid_berkay_altunbag.py
@@ -0,0 +1,7 @@
+def calculate_pyramid_height(number_of_blocks):
+    height = 0
+    used = 0
+    while used + (height + 1) <= number_of_blocks:
+        height += 1
+        used += height
+    return height
\ No newline at end of file
diff --git a/Week03/sequences_berkay_altunbag.py b/Week03/sequences_berkay_altunbag.py
new file mode 100644
index 00000000..0109906c
--- /dev/null
+++ b/Week03/sequences_berkay_altunbag.py
@@ -0,0 +1,13 @@
+def remove_duplicates(lst):
+    return list(dict.fromkeys(lst))
+
+
+def list_counts(lst):
+    counts = {}
+    for item in lst:
+        counts[item] = counts.get(item, 0) + 1
+    return counts
+
+
+def reverse_dict(d):
+    return {value: key for key, value in d.items()}
\ No newline at end of file