diff --git a/intro/Task102.py b/intro/Task102.py
new file mode 100644
index 0000000..a42657f
--- /dev/null
+++ b/intro/Task102.py
@@ -0,0 +1,2 @@
+def add_three_numbers(x: int, y: int, z: int) -> int:
+    return x + y + z
diff --git a/intro/Task103.py b/intro/Task103.py
new file mode 100644
index 0000000..ee4427c
--- /dev/null
+++ b/intro/Task103.py
@@ -0,0 +1,5 @@
+def probability(x: float) -> float:
+    if 0 <= x <= 1:
+        return x
+    else:
+        return 0
\ No newline at end of file
diff --git a/intro/Task104.py b/intro/Task104.py
new file mode 100644
index 0000000..7c9ad9e
--- /dev/null
+++ b/intro/Task104.py
@@ -0,0 +1,4 @@
+def fahrenheit(x: float) -> float:
+    if x < -273.15:
+        return -459.67
+    return x * (9/5) + 32
\ No newline at end of file
diff --git a/intro/Task105.py b/intro/Task105.py
new file mode 100644
index 0000000..3ae6714
--- /dev/null
+++ b/intro/Task105.py
@@ -0,0 +1,8 @@
+def is_almost_prime(number: int, limit: int) -> bool:
+    if number < 0:
+        return False
+    else:
+        for i in range(2, limit+1):
+            if number % i == 0:
+                return False
+        return True
diff --git a/intro/Task106.py b/intro/Task106.py
new file mode 100644
index 0000000..a100a52
--- /dev/null
+++ b/intro/Task106.py
@@ -0,0 +1,5 @@
+def penultimate(l: list, otherwise: object) -> object:
+    if (not l) or (len(l) == 1):
+        return otherwise
+    else:
+        return l[-2]
\ No newline at end of file
diff --git a/intro/Task107.py b/intro/Task107.py
new file mode 100644
index 0000000..759c80d
--- /dev/null
+++ b/intro/Task107.py
@@ -0,0 +1,11 @@
+def list_cubed(l: list) -> object:
+    if not l:
+        return 0
+
+    sum = 0
+
+    for i in range(l):
+        sum = sum + (i*i*i)
+
+    return sum
+