diff --git a/Work/bounce.py b/Work/bounce.py
index 3660ddd82..0210a6063 100644
--- a/Work/bounce.py
+++ b/Work/bounce.py
@@ -1,3 +1,9 @@
 # bounce.py
 #
 # Exercise 1.5
+height = 100
+coeff = 3.0/5
+
+for i in range(10):
+    height = height * coeff
+    print(round(height,4))
\ No newline at end of file
diff --git a/Work/mortgage.py b/Work/mortgage.py
index d527314e3..1a859bdce 100644
--- a/Work/mortgage.py
+++ b/Work/mortgage.py
@@ -1,3 +1,26 @@
 # mortgage.py
-#
-# Exercise 1.7
+
+principal = 500000.0
+rate = 0.05
+payment = 2684.11
+total_paid = 0.0
+
+extra_payment_start_month = 12*5
+extra_payment_end_month = extra_payment_start_month + 4*12
+extra_payment = 1000
+
+i = 1
+extra=0
+while principal > 0:
+    if i >= extra_payment_start_month and i <= extra_payment_end_month:
+        extra = extra_payment
+    if ((principal * (1+rate/12)) > (payment + extra)):
+        principal = principal * (1+rate/12) - (payment + extra)
+        total_paid = total_paid + payment + extra
+    else:
+        total_paid = total_paid + (principal * (1+rate/12))
+        principal = 0
+    extra = 0
+    print (i, total_paid, principal)
+    i = i+1
+print('Total paid', total_paid, "months", i-1)
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diff --git a/Work/sears.py b/Work/sears.py
new file mode 100644
index 000000000..8add59254
--- /dev/null
+++ b/Work/sears.py
@@ -0,0 +1,15 @@
+# sears.py
+
+bill_thickness = 0.11 * 0.001    # Meters (0.11 mm)
+sears_height   = 442             # Height (meters)
+num_bills      = 1
+day            = 1
+
+while num_bills * bill_thickness < sears_height:
+    print(day, num_bills, num_bills * bill_thickness)
+    day = day + 1
+    num_bills = num_bills * 2
+
+print('Number of days', day)
+print('Number of bills', num_bills)
+print('Final height', num_bills * bill_thickness)
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