diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_1.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_1.m
similarity index 94%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_1.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_1.m
index 836189bcade545f540ca4c1ea4ee2c0298a41ef7..f9b1032f3bcfe9156e5585f49aef6bb90bb80cc5 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_1.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_1.m
@@ -1,4 +1,4 @@
-% exercise 4.1.1
+% exercise 4.2.1
 
 % Number of samples
 N = 200; 
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_2.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_2.m
similarity index 96%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_2.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_2.m
index 8f1263219fc092b68dc35050c7aa6fcaca688007..285a701e92cec0420a6b668017eb362aa0557521 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_2.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_2.m
@@ -1,4 +1,4 @@
-% exercise 4.1.2
+% exercise 4.2.2
 
 % Number of samples
 N = 100; 
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_3.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_3.m
similarity index 96%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_3.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_3.m
index 02d28b4fe72f6ed5e078932908d3c4ec3560b13c..5c93ad6640f4cdceca9ab61c22c1cd2f71a2e7e2 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_3.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_3.m
@@ -1,4 +1,4 @@
-% exercise 4.1.3
+% exercise 4.2.3
 
 % Number of samples
 N = 1000; 
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_4.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_4.m
similarity index 90%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_4.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_4.m
index eba312a920b6d76ec7465a9d1cf4335b5e5f29a3..5f6a12b0eba50b647a93d88083e3b2f05ff2f855 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_4.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_4.m
@@ -1,4 +1,4 @@
-% exercise 4.1.4
+% exercise 4.2.4
 
 % Number of samples
 N = 1000; 
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_5.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_5.m
similarity index 97%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_5.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_5.m
index 5362705dc6904be5e283b27e978a38895d76df17..81bdf53d99994bd7996ae6efdd5bf983f214c170 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_5.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_5.m
@@ -1,4 +1,4 @@
-% exercise 4.1.5
+% exercise 4.2.5
 
 % Number of samples
 N = 1000; 
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_6.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_6.m
similarity index 97%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_6.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_6.m
index 6f104e34242d721bb3b828499ee7eca60dafea9b..39b8a5b485874e6c7fba1bc15f12440d4b3bf54b 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_6.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_6.m
@@ -1,4 +1,4 @@
-%% exercise 4.1.6
+%% exercise 4.2.6
 
 % Digits to include in analysis (to include all, n = 1:10);
 n = [1];
diff --git a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_7.m b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_7.m
similarity index 98%
rename from exercises/02450Toolbox_Matlab/Scripts/ex4_1_7.m
rename to exercises/02450Toolbox_Matlab/Scripts/ex4_2_7.m
index a79498fca3ed862980da5957982100639c337c44..ffa461539c29470c9860637d0779d804b0e48c26 100644
--- a/exercises/02450Toolbox_Matlab/Scripts/ex4_1_7.m
+++ b/exercises/02450Toolbox_Matlab/Scripts/ex4_2_7.m
@@ -1,4 +1,4 @@
-%% exercise 4.1.7
+%% exercise 4.2.7
 
 % Digits to include in analysis (to include all, n = 1:10);
 n = [1];
diff --git a/exercises/02450Toolbox_Python/Scripts/ex2_1_1.py b/exercises/02450Toolbox_Python/Scripts/ex2_1_1.py
deleted file mode 100644
index dea5b3f9d071dbfe5fc62042a0708269e31523c1..0000000000000000000000000000000000000000
--- a/exercises/02450Toolbox_Python/Scripts/ex2_1_1.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# exercise 2.1.1
-import numpy as np
-
-x = np.array([-0.68, -2.11, 2.39, 0.26, 1.46, 1.33, 1.03, -0.41, -0.33, 0.47])
-
-# Compute values
-mean_x = x.mean()
-std_x = x.std(ddof=1) # ddof: Delta Degrees of freedom
-median_x = np.median(x)
-range_x = x.max() - x.min()
-
-# Display results
-print("Vector:", x)
-print("Mean:", mean_x)
-print("Standard Deviation:", std_x)
-print("Median:", median_x)
-print("Range:", range_x)
-
-print("Ran Exercise 2.1.1")
\ No newline at end of file
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_1.R b/exercises/02450Toolbox_R/Scripts/ex4_2_1.R
similarity index 95%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_1.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_1.R
index d4716b7e6498910b1045ba7fe5a4b34a079e516f..1d8395b9320787960c4237b32b3499f29a903eb5 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_1.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_1.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.1
+# Exercise 4.2.1
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_2.R b/exercises/02450Toolbox_R/Scripts/ex4_2_2.R
similarity index 96%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_2.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_2.R
index ddb7d43b6c0874667f899a7bb6c581dcbe30cac6..ad847dd2523e5b0e0ea399e0c26c96476b994153 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_2.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_2.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.2
+# Exercise 4.2.2
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_3.R b/exercises/02450Toolbox_R/Scripts/ex4_2_3.R
similarity index 97%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_3.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_3.R
index 76fb13ebda1e787b01af6133e3ceb64d009f7ce5..9aac8b2801a00518f685aacba63ea88ba99507bc 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_3.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_3.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.3
+# Exercise 4.2.3
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_4.R b/exercises/02450Toolbox_R/Scripts/ex4_2_4.R
similarity index 96%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_4.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_4.R
index 86607cf49ad4750713195466cd5274942c4af4e2..d717df0f6ff06a7cfe6445146b14944b20c9ba26 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_4.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_4.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.4
+# Exercise 4.2.4
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_5.R b/exercises/02450Toolbox_R/Scripts/ex4_2_5.R
similarity index 98%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_5.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_5.R
index 8a34abf7928a9130e1f6a660c7db14677956b703..30daa0289bfc267d7590384d4667b6734b014e59 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_5.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_5.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.5
+# Exercise 4.2.5
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_6.R b/exercises/02450Toolbox_R/Scripts/ex4_2_6.R
similarity index 98%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_6.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_6.R
index ab9e60f75eb7fa4c121a0035c2a3f677fb114e7a..462b9d19db6107eaf361c2df69e0db61b8de0c75 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_6.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_6.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.6
+# Exercise 4.2.6
 ####################
 rm(list = ls()) # Clear work space
 
diff --git a/exercises/02450Toolbox_R/Scripts/ex4_1_7.R b/exercises/02450Toolbox_R/Scripts/ex4_2_7.R
similarity index 99%
rename from exercises/02450Toolbox_R/Scripts/ex4_1_7.R
rename to exercises/02450Toolbox_R/Scripts/ex4_2_7.R
index 2f22bd6b92d1dbc90fa3fdc9ea2fcae3cacc7cd7..ad3cf1f8e8bca22ad16a8beb4f8532c0d98986bd 100644
--- a/exercises/02450Toolbox_R/Scripts/ex4_1_7.R
+++ b/exercises/02450Toolbox_R/Scripts/ex4_2_7.R
@@ -1,5 +1,5 @@
 ####################
-# Exercise 4.1.7
+# Exercise 4.2.7
 ####################
 rm(list = ls()) # Clear work space