diff --git a/exercises/24-class-with-two-methods/README.es.md b/exercises/24-class-with-two-methods/README.es.md
index fffb54ba..fe7c5c59 100644
--- a/exercises/24-class-with-two-methods/README.es.md
+++ b/exercises/24-class-with-two-methods/README.es.md
@@ -1,10 +1,13 @@
-# `24` Una clase con dos métodos
+# `24` Class with two methods
 
-Define una clase que tenga al menos dos métodos:
-Define a class which has at least two methods:
-getString: obtener un string desde la entrada de la consola.
-printString: imprimir el string en mayúscula.
-Por favor incluye una función simple de prueba para probar los métodos de la clase.
+## 📝 Instrucciones:
 
-Pistas:
-Usa el método __init__ para construir algunos parámetros.
\ No newline at end of file
+1. Define una clase llamada `InputOutString` que tenga al menos dos métodos:
++ `get_string` para obtener un string de entrada desde la consola.
++ `print_string` para imprimir el string obtenido en mayúsculas.
+
+2. Prueba los métodos de tu clase.
+
+## 💡 Pista:
+
++ Usa el método `__init__` para construir tus parámetros.
diff --git a/exercises/24-class-with-two-methods/README.md b/exercises/24-class-with-two-methods/README.md
index 3971f14f..99a82215 100644
--- a/exercises/24-class-with-two-methods/README.md
+++ b/exercises/24-class-with-two-methods/README.md
@@ -1,9 +1,13 @@
 # `24` Class with two methods
 
-Define a class which has at least two methods:
-getString: to get a string from console input
-printString: to print the string in upper case.
-Also please include simple test function to test the class methods.
+## 📝 Instructions:
 
-Hints:
-Use __init__ method to construct some parameters
\ No newline at end of file
+1. Define a class called `InputOutString` which has at least two methods:
++ `get_string` to get a string from console input.
++ `print_string` to print the string in upper case.
+
+2. Test your class' methods.
+
+## 💡 Hint:
+
++ Use the `__init__` method to construct your parameters.
diff --git a/exercises/24-class-with-two-methods/app.py b/exercises/24-class-with-two-methods/app.py
index e69de29b..a51f0856 100644
--- a/exercises/24-class-with-two-methods/app.py
+++ b/exercises/24-class-with-two-methods/app.py
@@ -0,0 +1 @@
+# Your code here
diff --git a/exercises/24-class-with-two-methods/solution.hide.py b/exercises/24-class-with-two-methods/solution.hide.py
index b6917e80..e53abdf1 100644
--- a/exercises/24-class-with-two-methods/solution.hide.py
+++ b/exercises/24-class-with-two-methods/solution.hide.py
@@ -1,13 +1,14 @@
-class InputOutString(object):
+# Your code here
+class InputOutString:
     def __init__(self):
-        self.s = ""
+        self.input_string = ""
 
-    def getString(self):
-        self.s = raw_input()
+    def get_string(self):
+        self.input_string = input("Enter a string: ")
 
-    def printString(self):
-        print self.s.upper()
+    def print_string(self):
+        print(self.input_string.upper())
 
-strObj = InputOutString()
-strObj.getString()
-strObj.printString()
\ No newline at end of file
+string_object = InputOutString()
+string_object.get_string()
+string_object.print_string()
diff --git a/exercises/25-print-formula/README.es.md b/exercises/25-print-formula/README.es.md
index e38c0d3b..4a6d7736 100644
--- a/exercises/25-print-formula/README.es.md
+++ b/exercises/25-print-formula/README.es.md
@@ -1,19 +1,33 @@
-# `25` Imprime la fórmula
+# `25` Print formula
 
-Escribe un programa que calcule e imprima el valor de acuerdo a la fórmula dada:
+## 📝 Instrucciones:
 
-Q = Square root of [(2 * C * D)/H]
+1. Escribe una función llamada `print_formula()`, con un parámetro que calcule e imprima el valor según la fórmula dada.
 
-A continuación encontrarás los valores fijos de C y H:
-C es 50. H es 30.
-D es la variable cuyos valores debiesen ser ingresados en tu 
-Ejemplo:
-Digamos que le sentrega la siguiente secuencia separada por coma al programa:
-100,150,180
-El resultado del programa debiese ser:
-18,22,24
+```text
+Q = Square root of (2 * c * d) / h
+```
 
-Pistas:
-Si el resultado recicido es un decimal, debería rendondearse a su valor más cercano (por ejemplo, si el resultado es 26.0, debiese imprimirse como 26)
-En el caso de que se le hayan entregado datos a la cuestión, deben asumirse como una entrada de la consola.
- 
\ No newline at end of file
+*A continuación encontrarás los valores fijos de `c` y `h`:*
+
++ `c` es 50.
++ `h` es 30.
++ `d` sería el parámetro de la función.
+
+## 📎 Ejemplo de entrada:
+
+```py
+print_formula(150)
+```
+
+## 📎 Ejemplo de salida:
+
+```py
+22
+```
+
+## 💡 Pistas:
+
++ Si el resultado recibido es un decimal, debería redondearse a su valor más cercano (por ejemplo, si el resultado es 26.0, debiese imprimirse como 26).
+
++ Importa el módulo `math`.
diff --git a/exercises/25-print-formula/README.md b/exercises/25-print-formula/README.md
index b47224b0..0abc0f7a 100644
--- a/exercises/25-print-formula/README.md
+++ b/exercises/25-print-formula/README.md
@@ -1,17 +1,33 @@
 # `25` Print formula
 
-Write a program that calculates and prints the value according to the given formula:
-Q = Square root of [(2 * C * D)/H]
-
-Following are the fixed values of C and H:
-C is 50. H is 30.
-D is the variable whose values should be input to your program in a comma-separated sequence.
-Example
-Let us assume the following comma separated input sequence is given to the program:
-100,150,180
-The output of the program should be:
-18,22,24
-
-Hints:
-If the output received is in decimal form, it should be rounded off to its nearest value (for example, if the output received is 26.0, it should be printed as 26)
-In case of input data being supplied to the question, it should be assumed to be a console input. 
\ No newline at end of file
+## 📝 Instructions:
+
+1. Write a function `print_formula()`, with one parameter that calculates and prints the value according to the given formula:
+
+```text
+Q = Square root of (2 * c * d) / h
+```
+
+*Following are the fixed values of `c` and `h`:*
+
++ `c` is 50.
++ `h` is 30.
++ `d` would be the parameter of the function.
+
+## 📎 Example input:
+
+```py
+print_formula(150)
+```
+
+## 📎 Example output:
+
+```py
+22
+```
+
+## 💡 Hints:
+
++ If the output received is in decimal form, it should be rounded off to its nearest value (for example, if the output received is 26.0, it should be printed as 26).
+
++ Import the `math` module.
diff --git a/exercises/25-print-formula/app.py b/exercises/25-print-formula/app.py
index e69de29b..a51f0856 100644
--- a/exercises/25-print-formula/app.py
+++ b/exercises/25-print-formula/app.py
@@ -0,0 +1 @@
+# Your code here
diff --git a/exercises/25-print-formula/solution.hide.py b/exercises/25-print-formula/solution.hide.py
index 10c47e5b..3ddcff9c 100644
--- a/exercises/25-print-formula/solution.hide.py
+++ b/exercises/25-print-formula/solution.hide.py
@@ -1,5 +1,7 @@
+# Your code here
 import math
-def print_formula(num):
-    return round(math.sqrt(2*50*num/30))
 
-print(print_formula(5))
\ No newline at end of file
+def print_formula(d):
+    return round(math.sqrt(2 * 50 * d / 30))
+
+print(print_formula(150))
diff --git a/exercises/25-print-formula/test.py b/exercises/25-print-formula/test.py
index 27181781..0bb388ba 100644
--- a/exercises/25-print-formula/test.py
+++ b/exercises/25-print-formula/test.py
@@ -5,11 +5,11 @@
 def test_function_existence(capsys, app):
     assert app.print_formula
 
-@pytest.mark.it('The solution should work as expected')
+@pytest.mark.it('The solution should work as expected. Testing with 100')
 def test_expected_output(capsys, app):
-    assert app.print_formula(100,150,180) == "18,22,24"
+    assert app.print_formula(100) == 18
 
-@pytest.mark.it('The solution should work as expected')
+@pytest.mark.it('The solution should work as expected. Testing with 90')
 def test_another_output(capsys, app):
-    assert app.print_formula(200,90,300) == "26,17,32"
+    assert app.print_formula(90) == 17
 
diff --git a/exercises/26-two-dimensional-array/README.es.md b/exercises/26-two-dimensional-array/README.es.md
index b81dd4a6..c6a0a771 100644
--- a/exercises/26-two-dimensional-array/README.es.md
+++ b/exercises/26-two-dimensional-array/README.es.md
@@ -1,13 +1,19 @@
-# `26` Array de dos dimensiones
+# `26` Two dimensional list
 
-Escribe un progrsms que reciba dos dígitos X,Y como entrada y genere un array de dos dimensiones. El valor del elemento en la fila i-th y en la columna j-th del array debiese ser i*j.
-Nota: i=0,1.., X-1; j=0,1,¡­Y-1.
-Ejemplo:
-Supongamos que se le entregan lasa siguientes entradas al programa:
-3,5
-Entonces, el resultado del programa debería ser:
-[[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]] 
+## 📝 Instrucciones:
 
-Pistas:
-Nota: En el caso de que se le entreguen datos a la cuestión, debe asumirse como una entrada de la consola en un formulario separado por comas.
+1. Escribe una función llamada `two_dimensional_list()` que tome 2 dígitos (x, y) como entrada y genere una lista bidimensional o matriz.
 
+2. El valor del elemento en la fila `i` y columna `j` de la lista debería ser `i*j` (los valores de sus índices).
+
+## 📎 Ejemplo de entrada:
+
+```py
+two_dimensional_list(3,5)
+```
+
+## 📎 Ejemplo de salida:
+
+```py
+[[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]]
+```
diff --git a/exercises/26-two-dimensional-array/README.md b/exercises/26-two-dimensional-array/README.md
index 330f75a5..eed36f28 100644
--- a/exercises/26-two-dimensional-array/README.md
+++ b/exercises/26-two-dimensional-array/README.md
@@ -1,12 +1,20 @@
-# `26`Two dimensional array
-
-Write a program which takes 2 digits, X,Y as input and generates a 2-dimensional array. The element value in the i-th row and j-th column of the array should be i*j.
-Note: i=0,1.., X-1; j=0,1,¡­Y-1.
-Example
-Suppose the following inputs are given to the program:
-3,5
-Then, the output of the program should be:
-[[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]] 
-
-Hints:
-Note: In case of input data being supplied to the question, it should be assumed to be a console input in a comma-separated form.
\ No newline at end of file
+# `26` Two dimensional list
+
+## 📝 Instructions:
+
+1. Write a function `two_dimensional_list()`, that takes 2 digits (x, y) as input and generates a 2-dimensional list or matrix.
+
+2. The element value in the `i` row and `j` column of the list should be `i*j` (their index values).
+
+## 📎 Example input:
+
+```py
+two_dimensional_list(3,5)
+```
+
+## 📎 Example output:
+
+```py
+[[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]]
+```
+
diff --git a/exercises/26-two-dimensional-array/app.py b/exercises/26-two-dimensional-array/app.py
index e69de29b..a51f0856 100644
--- a/exercises/26-two-dimensional-array/app.py
+++ b/exercises/26-two-dimensional-array/app.py
@@ -0,0 +1 @@
+# Your code here
diff --git a/exercises/26-two-dimensional-array/solution.hide.py b/exercises/26-two-dimensional-array/solution.hide.py
index c1279fd2..190ac67e 100644
--- a/exercises/26-two-dimensional-array/solution.hide.py
+++ b/exercises/26-two-dimensional-array/solution.hide.py
@@ -1,11 +1,14 @@
-def two_dimensional_array(nList, nElements):
-    dimensions=[int(x) for x in "{},{}".format(nList,nElements).split(',')]
-    rowNum=dimensions[0]
-    colNum=dimensions[1]
-    multilist = [[0 for col in range(colNum)] for row in range(rowNum)]
+# Your code here
+def two_dimensional_list(n_rows, n_columns):
+    dimensions = [int(x) for x in "{},{}".format(n_rows, n_columns).split(',')]
+    row_num = dimensions[0]
+    col_num = dimensions[1]
+    matrix = [[0 for col in range(col_num)] for row in range(row_num)]
 
-    for row in range(rowNum):
-        for col in range(colNum):
-            multilist[row][col]= row*col
+    for row in range(row_num):
+        for col in range(col_num):
+            matrix[row][col] = row * col
 
-    return (multilist)
+    return matrix
+
+print(two_dimensional_list(3,5))
diff --git a/exercises/26-two-dimensional-array/test.py b/exercises/26-two-dimensional-array/test.py
index 5cd0300c..833f3836 100644
--- a/exercises/26-two-dimensional-array/test.py
+++ b/exercises/26-two-dimensional-array/test.py
@@ -1,18 +1,17 @@
-
 import pytest,os,re,io,sys, mock, json
 
-@pytest.mark.it('The function two_dimensional_array must exist')
+@pytest.mark.it('The function two_dimensional_list must exist')
 def test_function_existence(capsys, app):
-    assert app.two_dimensional_array
+    assert app.two_dimensional_list
 
-@pytest.mark.it('The function should return the expected output.')
+@pytest.mark.it('The function should return the expected output')
 def test_expected_output(capsys, app):
-    assert app.two_dimensional_array(3,5) == [[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]]
+    assert app.two_dimensional_list(3,5) == [[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]]
 
-@pytest.mark.it('The function should work with other entries. Testing with 2,7')
+@pytest.mark.it('The function should work with other entries. Testing with (2, 7)')
 def test_expected_output(capsys, app):
-    assert app.two_dimensional_array(2,7) == [[0, 0, 0, 0, 0, 0, 0], [0, 1, 2, 3, 4, 5, 6]]
+    assert app.two_dimensional_list(2,7) == [[0, 0, 0, 0, 0, 0, 0], [0, 1, 2, 3, 4, 5, 6]]
         
-@pytest.mark.it('The function should work with other entries. Testing with 2,7')
+@pytest.mark.it('The function should work with other entries. Testing with (1, 10)')
 def test_expected_output(capsys, app):
-    assert app.two_dimensional_array(1,10) == [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]
+    assert app.two_dimensional_list(1,10) == [[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]]
diff --git a/exercises/27-sequence-of-words/README.es.md b/exercises/27-sequence-of-words/README.es.md
index 290fdecf..05255296 100644
--- a/exercises/27-sequence-of-words/README.es.md
+++ b/exercises/27-sequence-of-words/README.es.md
@@ -1,10 +1,23 @@
-# `27` Secuencia de palabras
+# `27` Sequence of words
 
-Escribe un programa que acepte una secuencia separada por comas como entrada e imprima las palabras en una secuencia separada por comas después de ordenarlas alfabéticamente.
-Supongamos que se le entrega la siguiente entrada al programa:
-without,hello,bag,world
-El resultado debiese ser:
-bag,hello,without,world
+## 📝 Instrucciones:
 
-Pistas:
-En el caso de que se le entreguen datos a la pregunta, deben considerarse como entradas de la consola.
+1. Escribe una función llamada `sequence_of_words()`, que acepte una secuencia de palabras separadas por comas como entrada (un string).
+   
+2. Imprime las palabras en una secuencia separada por comas después de ordenarlas alfabéticamente.
+
+## 📎 Ejemplo de entrada:
+
+```py
+sequence_of_words("without,hello,bag,world")
+```
+
+## 📎 Ejemplo de salida:
+
+```py
+bag, hello, without, world
+```
+
+## 💡 Pista:
+
++ Recuerda que cada palabra debe estar separada por una coma y dentro de UN SOLO par de comillas.
diff --git a/exercises/27-sequence-of-words/README.md b/exercises/27-sequence-of-words/README.md
index be2f8cf0..3cacba0b 100644
--- a/exercises/27-sequence-of-words/README.md
+++ b/exercises/27-sequence-of-words/README.md
@@ -1,10 +1,23 @@
-# `27`Sequence of words
+# `27` Sequence of words
 
-Write a program that accepts a comma separated sequence of words as input and prints the words in a comma-separated sequence after sorting them alphabetically.
-Suppose the following input is supplied to the program:
-without,hello,bag,world
-Then, the output should be:
-bag,hello,without,world
+## 📝 Instructions:
 
-Hints:
-In case of input data being supplied to the question, it should be assumed to be a console input.
\ No newline at end of file
+1. Write a function `sequence_of_words`, that accepts a comma separated sequence of words as input (a string).
+   
+2. Print the words in a comma-separated sequence after sorting them alphabetically.
+
+## 📎 Example input:
+
+```py
+sequence_of_words("without,hello,bag,world")
+```
+
+## 📎 Example output:
+
+```py
+bag, hello, without, world
+```
+
+## 💡 Hint:
+
++ Remember that each word must be separated by a comma and inside ONLY ONE pair of quotes.
diff --git a/exercises/27-sequence-of-words/app.py b/exercises/27-sequence-of-words/app.py
index e69de29b..a51f0856 100644
--- a/exercises/27-sequence-of-words/app.py
+++ b/exercises/27-sequence-of-words/app.py
@@ -0,0 +1 @@
+# Your code here
diff --git a/exercises/27-sequence-of-words/solution.hide.py b/exercises/27-sequence-of-words/solution.hide.py
index 75bddc17..71949469 100644
--- a/exercises/27-sequence-of-words/solution.hide.py
+++ b/exercises/27-sequence-of-words/solution.hide.py
@@ -1,4 +1,7 @@
+# Your code here
 def sequence_of_words(words):
     items=[x for x in "{}".format(words).split(',')]
     items.sort()
     return (','.join(items))
+
+print(sequence_of_words("this,is,sorted"))
diff --git a/exercises/27-sequence-of-words/test.py b/exercises/27-sequence-of-words/test.py
index b48ffb1d..0b82f45e 100644
--- a/exercises/27-sequence-of-words/test.py
+++ b/exercises/27-sequence-of-words/test.py
@@ -9,6 +9,6 @@ def test_function_existence(capsys, app):
 def test_function_existence(capsys, app):
     assert app.sequence_of_words("bag,hello,without,world") == "bag,hello,without,world"
 
-@pytest.mark.it('The function should return the expected output')
+@pytest.mark.it('The function should return the expected output. Testing with different values')
 def test_function_existence(capsys, app):
-    assert app.sequence_of_words("No,pain,gain") == "No,gain,pain"
\ No newline at end of file
+    assert app.sequence_of_words("No,pain,gain") == "No,gain,pain"