diff --git a/Exercise 4 - Inspera/10.py b/Exercise 4 - Inspera/10.py
new file mode 100644
index 0000000..e2c86bb
--- /dev/null
+++ b/Exercise 4 - Inspera/10.py	
@@ -0,0 +1,21 @@
+month = input('Skriv inn en måned: ').lower()
+if month == 'februar':
+  year = input('Skriv inn et år: ')
+  isLeapyear = int(year) % 4 == 0
+  print(29 if isLeapyear else 28)
+else:
+  months = {
+      "januar": 31,
+      # "februar": 30,
+      "mars": 31,
+      "april": 30,
+      "mai": 31,
+      "juni": 30,
+      "july": 31, # Hmmm
+      "august": 31,
+      "september": 30,
+      "oktober": 31,
+      "november": 30,
+      "desember": 31
+  }
+  print(months[month])
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diff --git a/Exercise 4 - Inspera/11.py b/Exercise 4 - Inspera/11.py
new file mode 100644
index 0000000..8bf2250
--- /dev/null
+++ b/Exercise 4 - Inspera/11.py	
@@ -0,0 +1,32 @@
+months = {
+    "januar": 31,
+    # "februar": 30,
+    "mars": 31,
+    "april": 30,
+    "mai": 31,
+    "juni": 30,
+    "july": 31, # Hmmm
+    "august": 31,
+    "september": 30,
+    "oktober": 31,
+    "november": 30,
+    "desember": 31
+}
+
+def myMonth():
+  while True:
+    try:
+      month = input('Skriv inn en måned: ').lower()
+      if month == 'februar':
+        year = int(input('Skriv inn et år: '))
+        assert ((year >= 0) and ( year <= 2020))
+        isLeapyear = year % 4 == 0
+        days = 29 if isLeapyear else 28
+      else:
+        assert month in months
+        days = month[month]
+      return f'Det er {days} dager i denne måneden'
+    except:
+      print('Ugyldig input! Prøv på nytt!')
+
+print(myMonth)
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diff --git a/Exercise 4 - Inspera/12.py b/Exercise 4 - Inspera/12.py
new file mode 100644
index 0000000..b88372d
--- /dev/null
+++ b/Exercise 4 - Inspera/12.py	
@@ -0,0 +1,4 @@
+import re
+
+def correct_word(string):
+    return bool(re.match('^\w+$', string))
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diff --git a/Exercise 4 - Inspera/13.py b/Exercise 4 - Inspera/13.py
new file mode 100644
index 0000000..f1b8bb6
--- /dev/null
+++ b/Exercise 4 - Inspera/13.py	
@@ -0,0 +1,8 @@
+import re
+
+def count_letters(string):
+    try:
+        assert bool(re.match('^\w+$', string))
+        return len(string)
+    except AssertionError:
+        return -1
\ No newline at end of file
diff --git a/Exercise 4 - Inspera/15.py b/Exercise 4 - Inspera/15.py
new file mode 100644
index 0000000..585e985
--- /dev/null
+++ b/Exercise 4 - Inspera/15.py	
@@ -0,0 +1,5 @@
+def spam_with_questions(question) -> str:
+  while True:
+    answer = input(question).lower()
+    if answer == 'stopp':
+      break
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diff --git a/Exercise 4 - Inspera/16.py b/Exercise 4 - Inspera/16.py
new file mode 100644
index 0000000..f488895
--- /dev/null
+++ b/Exercise 4 - Inspera/16.py	
@@ -0,0 +1,12 @@
+def energy_efficient_spamming(q1, q2):
+  try:
+    assert len(q1)>len(q2)
+    answer = input(q1)
+    while True:
+      if answer == 'stopp':
+        break
+      answer = input(q2)
+  except AssertionError:
+    return
+
+energy_efficient_spamming('jadu', 'nei')
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diff --git a/Exercise 4 - Inspera/17.py b/Exercise 4 - Inspera/17.py
new file mode 100644
index 0000000..4f0a677
--- /dev/null
+++ b/Exercise 4 - Inspera/17.py	
@@ -0,0 +1,3 @@
+def triangle(h):
+    for n in range(1,h+1):
+        print('* '*n)
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diff --git a/Exercise 4 - Inspera/18.py b/Exercise 4 - Inspera/18.py
new file mode 100644
index 0000000..2b4ed0f
--- /dev/null
+++ b/Exercise 4 - Inspera/18.py	
@@ -0,0 +1,3 @@
+def triangle(h):
+    for n in reversed(range(1,h+1)):
+        print('* '*n)
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diff --git a/Exercise 4 - Inspera/19.py b/Exercise 4 - Inspera/19.py
new file mode 100644
index 0000000..9d93e6a
--- /dev/null
+++ b/Exercise 4 - Inspera/19.py	
@@ -0,0 +1,4 @@
+def isosceles_triangle(h):
+  for i in range(1, h+1):
+    spaces = h-i
+    print(spaces*' ' + i*'* ')
\ No newline at end of file
diff --git a/Exercise 4 - Inspera/20.py b/Exercise 4 - Inspera/20.py
new file mode 100644
index 0000000..89a057f
--- /dev/null
+++ b/Exercise 4 - Inspera/20.py	
@@ -0,0 +1,13 @@
+def cubeInput():
+  while True:
+    try:
+      l,w,h = (float(input('Lengde: ')), float(input('Bredde: ')), float(input('Høyde: ')))
+      assert w != l and l != h and w != h
+      return (l,w,h)
+    except AssertionError:
+      print('Morten er ikke fornøyd, prøv igjen')
+    except ValueError:
+      print('Det er ikke et tall, prøv igjen')
+
+d = min(cubeInput())
+print(f'Den største kuben vil ha et volum på {d**3}')
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diff --git a/Exercise 4 - Inspera/5.py b/Exercise 4 - Inspera/5.py
new file mode 100644
index 0000000..4a19b1f
--- /dev/null
+++ b/Exercise 4 - Inspera/5.py	
@@ -0,0 +1,4 @@
+x = 3
+while x:
+  print('#'*x)
+  x-=1
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diff --git a/Exercise 4 - Inspera/7.py b/Exercise 4 - Inspera/7.py
new file mode 100644
index 0000000..260ce0a
--- /dev/null
+++ b/Exercise 4 - Inspera/7.py	
@@ -0,0 +1 @@
+print(f'Det minste talled du skrev inn var { min([int(input("Skriv et tall: ")) for _ in range(5)]) }.')
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diff --git a/Exercise 4 - Inspera/9.py b/Exercise 4 - Inspera/9.py
new file mode 100644
index 0000000..2fe4e8a
--- /dev/null
+++ b/Exercise 4 - Inspera/9.py	
@@ -0,0 +1,3 @@
+def print_table(n):
+  for a in range(1, n+1):
+    print(' '.join([str(a*b) for b in range(1, n+1)]))
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