fix: update exercises based on comments

Author: jakr-s

Sprint-1/1-key-exercises/3-paths.js

@@ -18,6 +18,6 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the ext part of the variable
 
 const dir = filePath.slice(1, lastSlashIndex);
-const ext = base.split(".")[1];
+const ext = base.slice(base.lastIndexOf(".") + 1);
 
 // https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -11,15 +11,15 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // The num variable will evaluate to a random number between the minimum and maximum values
 
 // Math.random()
-// Random decimal number (0 - 1)
+// Random decimal number [0, 1)
 
 // (maximum - minimum + 1)
 // The size of the range
 
 // Math.random() * (maximum - minimum + 1)
-// Random decimal (0 - 100)
+// Random decimal [0, 101)
 
 // Math.floor(...)
-// Rounds the result down to a whole number (0 - 99)
+// Rounds the result down to a whole number [0, 100]
 
-// Adding minimum shifts the range up, so the final result is between the minimum and maximum (1 - 100 inclusive)
+// Adding minimum shifts the range up, so the final result is between the minimum and maximum [1, 100]

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -17,9 +17,9 @@ const pounds = paddedPenceNumberString.substring(
 );
 
 // 5. extracts the pence part by taking the last two digits, and pads with trailing zeroes if needed
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+const pence = paddedPenceNumberString.substring(
+  paddedPenceNumberString.length - 2
+);
 
 // 6. formats and prints the result as a pounds and pence string
 console.log(`£${pounds}.${pence}`);