diff --git a/problem_18.py b/problem_18.py
index e69de29..adcf926 100644
--- a/problem_18.py
+++ b/problem_18.py
@@ -0,0 +1,39 @@
+grid = [
+    [75],
+    [95,64],
+    [17,47,82],
+    [18,35,87,10],
+    [20, 4,82,47,65],
+    [19, 1,23,75, 3,34],
+    [88, 2,77,73, 7,63,67],
+    [99,65, 4,28, 6,16,70,92],
+    [41,41,26,56,83,40,80,70,33],
+    [41,48,72,33,47,32,37,16,94,29],
+    [53,71,44,65,25,43,91,52,97,51,14],
+    [70,11,33,28,77,73,17,78,39,68,17,57],
+    [91,71,52,38,17,14,91,43,58,50,27,29,48],
+    [63,66, 4,68,89,53,67,30,73,16,69,87,40,31],
+    [ 4,62,98,27,23, 9,70,98,73,93,38,53,60, 4,23]]
+
+highest_sum = 0
+
+# take the current number index at grid slice
+# call into the index, and then the index + 1 on the next grid slice
+
+def recursive_solver(index, level):
+
+    if level == len(grid)-1:
+        return grid[level][index]
+
+    else:
+        val1 = recursive_solver(index, level + 1) + grid[level][index]
+        val2 = recursive_solver(index + 1, level + 1) + grid[level][index]
+
+        if val1 > val2:
+            return val1
+        else:
+            return val2
+
+
+
+print(recursive_solver(0, 0))
\ No newline at end of file
diff --git a/problem_19.py b/problem_19.py
new file mode 100644
index 0000000..a58d99a
--- /dev/null
+++ b/problem_19.py
@@ -0,0 +1,31 @@
+import time
+from time import gmtime, strftime, struct_time
+from datetime import date, datetime, timedelta
+import datetime
+import re
+
+
+d = datetime.datetime(1901,1,1,0,0,0).timetuple()
+
+print(strftime("%a, %d %b %Y %H:%M:%S +0000", d))
+
+
+
+def datespan(startDate, endDate, delta=timedelta(weeks=1)):
+    currentDate = startDate
+    while currentDate < endDate:
+        yield currentDate
+        currentDate += delta
+
+span = datespan(date(1901, 1, 1), date(2000, 12, 31))
+
+days = 0;
+
+for i in span:
+    split = str(i).split('-')
+    day = int(split[2])
+
+    if day == 1:
+        days += 1
+
+print(days)
\ No newline at end of file
diff --git a/problem_20.py b/problem_20.py
new file mode 100644
index 0000000..cdb6ef8
--- /dev/null
+++ b/problem_20.py
@@ -0,0 +1,13 @@
+
+import math
+
+value = math.factorial(100)
+
+string = str(value)
+
+sum = 0
+
+for i in string:
+    sum += int(i)
+
+print(sum)
\ No newline at end of file
diff --git a/problem_21.py b/problem_21.py
new file mode 100644
index 0000000..3d2ba56
--- /dev/null
+++ b/problem_21.py
@@ -0,0 +1,5 @@
+import math
+
+
+
+count_array
\ No newline at end of file